How to Bypass Android Lock Screen Using Emergency Call On Vivo S18?

How to Bypass Android Lock Screen Using Emergency Call On Vivo S18?

Marry Lv13

How to Bypass Android Lock Screen Using Emergency Call On Vivo S18?

The main reason why we keep our smartphone locked is to prevent children (or stalkers) checking out our private photos or messages. You don’t want anyone to access your pictures, emails, or other important data. What if you forget your pattern or PIN and cannot access your phone? Or someone changes lock screen pattern to leave you annoyed?

To avoid such types of conditions, we have tried and tested the following methods to bypass the Vivo lock screen pattern, PIN, password, and fingerprint.

Method 1. Use ‘Find My Mobile’ feature on Vivo Phone

All Vivo devices come with the “Find My Mobile” feature. To bypass the Vivo lock screen pattern, PIN, password, and fingerprint, you can just follow the below steps to get it done.

  • Step 1. First, set up your Vivo account and log in.
  • Step 2. Click the “Lock My Screen” button.
  • Step 3. Enter a new PIN in the first field
  • Step 4. Click the “Lock” button at the bottom
  • Step 5. Within a few minutes, it will change the lock screen password to the PIN so that you can unlock your device.

how to unlock samsung phone lock password-find my mobile

Method 2. Use Android Device Manager to Bypass Vivo Password

To know how to unlock a Vivo phone lock password with Android device manager, make sure the Android Device Manager is enabled on your device.

  • Step 1. Visit google.com/android/devicemanager on other smartphones or PC.
  • Step 2. Log into your Google account that you used on your locked device.
  • Step 3. Choose the Vivo S18 device you want to unlock in ADM interface
  • Step 4. Click on the “Lock” option.
  • Step 5. Enter a password. There is no need to enter any recovery message. Select “Lock” again.
  • Step 6. You would see a confirmation below if it is successful, with “Ring, Lock and Erase” buttons.
  • Step 7. Now you must get the password field on your phone where you can enter your new password, and your phone will be unlocked.
  • Step 8. Go to lock screen settings on your device and disable the temporary password.

how to unlock samsung phone lock password-android device manager

Method 3. Google Login (Supports Only Android 4.4 or Lower)

If your device is still running on Android 4.4 or lower, here’s how to bypass the Vivo lock screen fast.

  • Step 1. Enter the wrong pattern for five times
  • Step 2. Choose “Forgot Pattern”
  • Step 3. Enter your Google account login or backup PIN
  • Step 4. Now your phone would be unlocked.
![how to unlock a samsung phone without the code-google login](https://images.wondershare.com/drfone/others/14623533542919.jpg)

Method 4. ‘Pattern Password Disable’ and Custom Recovery (SD Card needed)

To bypass the Vivo lock screen in this method, you ought to be an advanced user who knows what are “custom recovery” and “rooting”. You have to install any kind of customer recovery, and you should have an SD card on your phone. SD card is required to move a ZIP file to the phone, and it is the only way to transfer the file when the Vivo S18 device is locked.

  • Step 1. Download a zip file named “Pattern Password Disable” on your computer and move it to the SD card of your Vivo device.
  • Step 2. Insert the card on your device
  • Step 3. Restart your device into recovery mode.
  • Step 4. Flash the file on your card and restart the phone.
  • Step 5. Now your phone would boot up without lock screen. Don’t worry if you had a gesture lock or password. All you need to do is to input a random gesture or password, and it will be unlocked.

Method 5. Delete the Password File Using ADB

It is yet another option that will work only when you have enabled USB Debugging previously on your device, and your PC is allowed to connect via ADB. If you meet such requirements, it is ideal to use this method to unlock the Vivo lock screen.

  • Step 1. Connect your device to the PC using USB cable and open command prompt in the adb directory. Type the command “adb shell rm /data/system/gesture.key” and then press “Enter”.
  • Step 2. Restart your phone, and a secure lock screen must be gone, and you can access your device. Be sure to set a new PIN, pattern, or password before rebooting again.

how to unlock a samsung phone without the code-adb command

Method 6. Factory Reset to Bypass Vivo Lock Screen

A factory reset is the best option in almost any case if one of these solutions couldn’t work. According to your device type, the process may vary. In most devices, you have to turn off the Vivo S18 device completely to start the process. But this method will delete all the precious data on the Vivo S18 device after the factory reset.

  • Step 1. Hold the power button and volume down at the same time. It will open the Bootloader menu.
  • Step 2. Press the volume down button two times to choose “Recovery Mode” and select it by pressing the “Power” button.
  • Step 3. Hold down the power button and tap “Volume Up” once, and you would enter “recovery” mode.
  • Step 4. Choose “Wipe Data/Factory Reset” option by using volume buttons.
  • Step 5. Select it by pressing the Power button.
  • Step 6. Select “Reboot System Now” once the process is done.

how to unlock a samsung phone without the code-factory reset

Backup your Vivo phone regularly in case of any data loss in the future.

Method 7. Boot into Safe Mode

Chances may be that you are using a third-party lock screen app. Then lucky for you, this way works best to bypass the Vivo lock screen. Specifically, you can boot your Vivo device into Android Safe Mode .

  • Step 1. Open up the Power menu from the lock screen and press and hold the “Power Off” option.
  • Step 2. It will ask if you want to boot in safe mode. Tap “OK”
  • Step 3. Once the process finishes, it will temporarily disable the lock screen activated by the third-party app.
  • Step 4. Uninstall the third-party lock screen or just reset the data.
  • Step 5. Reboot your device and get out of safe mode.
  • Step 6. Now the irritating lock screen app is removed completely.

how to unlock a samsung phone without the code-android safe mode

Method 8. Other Methods

  • Step 1. Take your friend’s phone to call on your locked phone.
  • Step 2. Accept the call and press the back button without disconnecting.
  • Step 3. Now you can access the Vivo S18 device completely
  • Step 4. Go to the security settings of the Vivo S18 device and remove the pattern or pin.
  • Step 5. It will ask you the correct pin that you don’t know, guess, and try various combinations you can recall.

To avoid forgetting your password or PIN next time, be sure to write the pattern or numbers on a text file or paper to keep them safe. If you have to bypass the Vivo lock screen pattern, PIN, password, and fingerprint, you may consider using Dr.Fone - Screen Unlock (Android). It is a professional tool that can remove all the fingerprints, pattern, and password lock screens without losing any data on your phone.

Pattern Locks Are Unsafe: Secure Your Vivo S18 Phone Now with These Tips

Pattern locks have been available for about as long as people can remember, and they have been hugely popular with people thanks to how easy it is to simply swipe your screen and unlock your smartphone, as against, say, keying in the 4-digit PIN/ 6-digit PIN. However, pattern locks are easy to crack, and today, we bring you all you want to know about pattern locks and how to create a hard pattern lock. Further to this, we also tell you how to move beyond pattern locks and what to do in case you forgot the hard pattern lock you just set and are unable to unlock your smartphone.

creating more secure pattern locks

Part 1: What You Need to Know About Pattern Locks

Pattern lock is an Android-only feature that makes it easy for users to have a modicum of security on their smartphones. Most users do not prefer using and remembering a PIN to unlock the smartphone. Creating a pattern makes it easier, somehow.

There is a 9-point grid on which you swipe your finger from point to point, in any direction, and when you take your finger off, that pattern you swiped becomes the key to unlock your smartphone.

Pattern locks were exceedingly common only a few years ago, and they are not recommended for use any longer due to concerns (mentioned later in the article).

1.1: Popularity and Usage

Old habits die hard, or so they say, right? That’s because it is true. We are creatures of habit, and pattern locks have been around for a long, long time. We are accustomed to pattern locks. So, even with even easier technologies such as fingerprint recognition and face recognition, we tend to gravitate towards the familiar old pattern lock.

The only thing is, there is a reason why pattern locks are no longer the preferred option to use for unlocking your smartphones. As it happens, that reason is security, and it can be very easy for humans to take a swipe (pardon the pun) at your pattern lock. And guess what? The research conducted suggests that they would get it right with an unsettling accuracy.

1.2: Advantages and Drawbacks

With on-the-go lifestyles, our smartphones have become indispensable and contain some of the most sensitive aspects of our lives – IDs, credit and debit cards in digital wallets, photo and video memories, business documents – you name it, the smartphones have it, on the go. This has opened our lives up to the public at large, and if someone steals our smartphone or, best case, finds it, the only barrier preventing them from being privy to all that wealth of our sensitive information is that screen lock – the pattern lock that we set on our smartphones. That’s it – the single pattern lock stands between malicious actors and our data. You might be beginning to realize just how crazy this is.

Advantages of Pattern Locks

There are two advantages to using pattern locks. One, they are better than nothing. Two, they are easy to use. And that’s about it. There is no third advantage to pattern locks. We might think we set a hard pattern lock that nobody could guess, but, as research proves, we might be thinking too low of human prowess.

Disadvantages of Pattern Locks

Security, or rather, the lack of it, is the lone disadvantage of using a pattern lock. What good is a pattern lock that can be easily deciphered? Sure, they are easy to use, and they are better than not having anything, but would you really want to protect your life’s data with something that could be, as researchers found out, breached in under 5 attempts? We don’t think you do!

The research found that 64% of test subjects who were shown videos of people unlocking their phones could correctly guess a 6-point pattern lock, that too after viewing the video only once! That number shot up to 80% if they were allowed to see the video again. That is simply astounding and a nightmare for security. When it comes to PINs, only 11% could guess a 6-digit PIN after viewing the unlocking video once, and that number shot up to 27% when they could see the video two times.

Part 2: How To Create a Hard Pattern Lock (Including Remembering Complex Patterns)

Now, if you must continue using a pattern lock, let’s help you know how to create a hard pattern lock that would not be as easy to decipher as easy pattern locks. For that, you should know how people use pattern locks, the kind of pattern locks they create, and the ones that are the most commonly used pattern locks. That way, you can avoid those fallacies and create a hard pattern lock for your smartphone.

2.1: The Pattern Locks People Use Most Commonly

common pattern locks

Marte Loge, an M.Sc. Computer Science student, gave a presentation on pattern locks at DEFCON 23 and made a bold claim. She said, “Tell me who you are, and I will tell you your lock pattern.”

She presented the following statistics to support her claim:

  • - In her research, she found that 77% of people started with one of the 4 corners when creating a pattern lock.
  • - 44% of people started with the top-left dot and 15% with the top-right, while the bottom-left was preferred by 14% of her test subjects.
  • - People set 5-point pattern locks on average, and most users were content with a 4-point pattern.

These are some of the most common pattern locks people create:

  • - patterns in the shapes of alphabets,
  • - patterns in the shapes of numerals,
  • - patterns in any other simple shape, such as square, triangle, star, etc.

To understand how this is a security nightmare, the possible combinations for a 4-point pattern are a measly 1624, whereas by adding just 1 more point to the pattern and creating a 5-point pattern, the number of possible combinations becomes 7152, an increase of 5528 combinations. In stark contrast, creating a 9-point pattern would give you over 140,000 possible combinations!

2.2: How to Create a Hard Pattern Lock

Knowing what most people do when creating a pattern lock, it becomes easy to avoid those mistakes and instead create a hard pattern lock for oneself.

  • - Do not start creating a pattern lock from any of the 4 corners of the grid.
  • - Never use your first initial as your pattern lock.
  • - Never use the shape of a numeral as your pattern lock.
  • - Use all 9 points on the grid to create your pattern lock, and contrary to popular belief, you can go over the connecting lines several times, creating a hard pattern lock that would not be as easy for people to decipher!

Part 3: Going Beyond Pattern Locks

You might think that now that you have set a hard pattern lock, you are good to go. Hardly. Technology has evolved, so have methods to break into your device.

Step 1: Set a 6-digit PIN

The minimum you should do today is set a 6-digit PIN to unlock your phone. Consider this a necessary investment into the safety of your data residing on your smartphone.

Step 2: Use Fingerprint Recognition (or Face Recognition on Apple Devices)

All modern smartphones released over the last decade have come with fingerprint recognition. Using fingerprint recognition requires you to set a 6-digit PIN and then set a fingerprint to unlock your device. You can set additional fingerprints, too.

This way, your device is the most secure it can be today. In case your fingerprint is not recognized for any reason, the phone falls back on the 6-digit PIN that you can enter and unlock your phone.

While face recognition is available on both Android and Apple devices, it is truly secure only on Apple devices. This is why Apple iPhones released after the iPhone X in 2017 have come only with Face ID. They fall back on a minimum 6-digit PIN (called Passcode in Apple world) to unlock in case the face does not get recognized in the first attempt.

Part 4: How To Unlock Phone If Hard Pattern Lock Forgotten

Just in case you set a hard pattern lock and promptly forgot that abstruse pattern you just set, we have a tool for you to quickly unlock your phone in case of a forgotten hard pattern lock: Wondershare Dr.Fone - Screen Unlock.

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Dr.Fone - Screen Unlock (Android)

Remove the Hard Pattern Lock on Your Vivo S18 If You Forgot!

  • Remove all Android screen locks (PIN/pattern/fingerprints/face ID) in minutes.
  • Bypass the FRP lock of Samsung without a PIN or Google account.
  • Everyone can handle the lock screen without any tech knowledge.
  • Provide specific removal solutions to promise good success rate.

4,008,671 people have downloaded it

Download the latest version of Dr.Fone from the Wondershare website and launch the app.

drfone app

Step 1: Click Android under Toolbox > Screen Unlock.

drfone android screen unlock

Step 2: Click Unlock Android Screen.

drfone screen unlock android

Step 3: Select your device manufacturer.

drfone screen unlock manufacturer selection

Step 4: Prepare your device to unlock the screen.

wipe partition cache instructions

When the greyed Next button becomes available, click it and wait for your device to be unlocked.

screen unlock successful

All data on the Vivo S18 device is wiped under this method. Select Samsung phones may be unlocked without data loss. Check this list for devices that may be unlocked without data loss.

Closing Words

Whether it is an easy pattern lock or a hard pattern lock, the fact is that pattern locks are antiquated and a security nightmare. A minimum 6-digit PIN must be used, and using fingerprint recognition is the preferred way to go for Android devices. Using fingerprint recognition will require that users create a 6-digit PIN. On Apple devices launched after 2017, there is Face ID, Apple’s marketing term for face recognition. If you did indeed still set a hard pattern lock, only to promptly forget it, use Wondershare Dr.Fone – Screen Unlock (Android) to seamlessly unlock your phone right now.

10 Easy-to-Use FRP Bypass Tools for Unlocking Google Accounts On Vivo S18

FRP, popularly known as the Factory Reset Protection program, is an additional data protection feature for all Android users. As per the FRP feature, in any unfortunate event wherein you lose the Vivo S18 device or if any unauthorized person tries to reset it, the Vivo S18 device will require the Google Account ID and password to be fed in. So, this program is designed to curb the chances of theft and other fraudulent activities.

However, it was found that the FRP feature comes out as trouble for those who somehow forget their Google Account ID/ password, or who have purchased a second-hand phone either online or via some third-party source. Hence, it is important to know how to bypass a Google Account. Below mentioned are the Top 10 FRP tools to bypass Google accounts.

Tool 1: Android FRP Bypass Helper - Dr.Fone - Screen Unlock (Android OS 2.1 or later)

Dr.Fone - Screen Unlock can help you bypass your Google account and enter into your device’s home screen with ease. No matter whether you can’t get the Google account from previous sellers, or just forgot the PIN. In just 5 minutes, your Google FRP lock can be removed.

Safe downloadsafe & secure

Features

  • Available for Samsung/Xiaomi/Readmi/OPPO/Realme/Vivo devices.
  • It provides a useful guide.
  • Dr.Fone - Screen Unlock can reactivate the lock removers

Price: $39.95/year, Go and check Dr.Fone –Screen Unlock.

Pros:

  • a. Easy to use with detailed guide including video guide.
  • b. Only need a few minutes to complete.
  • c. It is also useful for users who do not know their mobile phone model.
  • d. It is safe and convenient.

Cons:

A little pricey, but worth it.

You can easily download it from Dr.Fone’s official website within one minute and use it with our detailed instructions. Even if you don’t know the specific model of your Samsung device, Dr.Fone - Screen Unlock will provide you with quality service and assistance. Check the bypass FRP lock guide in detail to help you disable your Google account on your Android smartphone.

Dr.Fone - Screen Unlock (Android)

Bypass Android FRP Lock without Google Account or a PIN Code.

  • It is helpful even though you don’t know the OS version of your Samsung.
  • Only remove the lock screen, no data loss at all.
  • No tech knowledge asked, everybody, can handle it.
  • Work also for Xiaomi, Redmi, Oppo, Realme, Vivo devices.

4,926,978 people have downloaded it

Tool 2: Samsung Reactivation/FRP Lock Removal Service

Samsung Reactivation/FRP unlocking service can solve your FRP issue through an online service. With this, you only need to enter your phone details to get the unique user ID and password. The staff will contact and help you to bypass the Google FRP lock on your Samsung devices within 24-72 hours.

frp bypass tools-samsung-frp-lock-removal

Features

  • Unlock most Samsung FRP locks, not limited to the version of Android.
  • Huaman service only, solve the problem with the help of staff.

 Go and check  Samsung Reactivation/FRP unlocking service

Pros:

  • It provides online service - no confusing video tutorials and no risky software to download.
  • No tech knowledge is required. Everybody can handle it.
  • Issues will be solved within 24-72 hours.

Cons:

  • It supports Samsung phones only now.
  • It takes a long time to wait.

Tool 3: FRP/Google Account Bypass and Flashing Tool

One of the best tools that cover almost all the latest versions of Android phones. This tool is quite easy to use.

frp bypass tools-Tool 4

Features

  • Works for Samsung, HTC, MTK, MI, QUALCOMM, SPD, and many more devices.
  • This tool is for all the latest device versions.
  • The old version of SP Flash is also covered by this tool.

 Go and check  FRP/Google Account Bypass and Flashing Tool

Price: Free

Pros: Work for almost all the versions of Android phones.

Cons: Currently not tested with Android versions 5.1.1 and 6.0.1.

Tool 4: FRP Bypass Solutions

FRP Bypass Solutions is tested and updated for the process of bypassing Google verification if you forget the credentials of your account.

frp bypass tools-Tool 5

Features

  • It works with all Android devices such as Moto series, LG, ZTE, HUAWEI, Vodafone, Samsung, Lenovo, HISENSE, XPERIA, and lots more.
  • It covers the latest versions and the team keeps it updated.
  • It is a useful tool for Samsung Galaxy S8.

 Go and check  FRP Bypass Solutions

Price: $7.00

Pros: The tool has been tested and verified to work for Android 7.0 and 7.1.

Cons: You need to purchase the tool to use all its features.

Tool 5: D&G Password Unlocker

D&G unlocker tool assists you in step by step and comprehensive way to unlock your Android phones. It can help Android users to remove FRP restrictions from their mobiles and tablets in a few seconds. The program will work for major brands including Samsung, Lenovo, Motorola, Xiaomi, Huawei, HTC, and Yuphoria.

frp bypass tools-Tool 6

Features

  • It is compatible with Windows 7, 8, 10, XP, and Vista.
  • It supports Samsung, Motorola, Huawei, HTC, Lenovo, Xiaomi, and Euphoria.

 Go and check  D&G Password Unlocker

Price: Free

Pros: Provides free setup for Windows.

Cons: There are no details available for LG devices.

Tool 6: Pangu FRP Bypass tool for Remove 2017

The processing time is just about 10 minutes. This facility is for the Authorized Google account owner. With this tool, the FRP lock will get removed.

frp bypass tools-Tool 7

Features

  • This tool works for All Samsung, Motorola, Micromax, Lenovo, MTK, and SPD devices.
  •  Lollipop 5.1, Marshmallow 6.1, Nougat 7.0 and 7.1.2, and Oreo 8.0.

 Go and check  D&G Password Unlocker

Price: Free

Pros: Works well with all Samsung and other devices.

Cons: The tool requires you to use an OTG cable with a pen drive or a computer.

## Tool 7: FRP lock Google Verification Bypass Tool Software

This is a kind of software program that is innovative and through this unlocker tool, additional protection for the Android devices can get bypassed.

frp bypass tools-Tool 8

Features

It works for HTC, Samsung devices, Motorola, Huawei, Lenovo, OPPO, LG, Alcatel, Xiaomi, Sony, and other Android devices.

 Go and check  FRP lock Google Verification Bypass

Price: Free

Pros:

  • Works well for almost all Android devices and unblocks any Android phone with a Reactivation Lock error.
  • It is 100% free.
  • Also, it works for higher Android versions from 5.1.1 – 6.0 to 7.1.

Cons: To Apply this method you need a Wi-Fi connection or a micro USB cable.

Tool 8: Samsung FRP Helper V.0.2 FRP Removal Tools

Samsung FRP tool uses the ADB feature to Bypass the FRP verification process.

frp bypass tools-Tool 9

### Features
  • This tool has an easy and interactive GUI.
  • It comes with a detailed guide.

 Go and check  Samsung FRP Helper V.0.2 FRP Removal

Price: Free

Pros: Easy to use and comes with a guide.

Cons:

  • It does not work with other models besides Samsung.
  • Combination firmware is required to run this software.

Tool 9: GSM Flasher ADB Bypass FRP Tool

GSM flasher uses an easy and accessible way to bypass an Android device’s lock through a USB cable. The downloading, as well as the complete setup, takes a few minutes. Also, ADB (Android debug bridge) helps you to have to communicate with your device.

frp bypass tools-Tool 10

Features

  • a. GSM flasher software setup is easy to use.
  • It works with all OS types.
  • A pattern lock removal facility is also available.
  • This file can be used for the reactivation of lock removers.

 Go and check  GSM Flasher ADB Bypass FRP

Price: Free

Pros: It can be used for all types of Android devices.

Cons: Can also act as a reactivator for lock removers.

Tool 10: FRP Bypass APK Download Samsung for Android

FRP Bypass helps to overcome the security feature of the Vivo S18 device so that you can easily bypass the Google Account verification process. As per user ratings, FRP Bypass APK has 4.1 Stars.

frp bypass tools-Tool 3

Features

  • A useful tool for Samsung Galaxy devices.
  • Download and use it for free.
  • You can also share this tool with your friends and family.

 Go and check  FRP Bypass APK Download Samsung for Android

Price: Free

Pros:

If you have forgotten your Google Account ID/ password, this tool will come in handy.

Cons:

  • You cannot access this tool directly through the local market or resources.
  • Play Store users cannot access this tool.

The Comparison of the 10 FRP Bypass Tools

Bypass FRP Tools Unique Feature Price Cons
Dr.Fone - Screen Unlock hot icon Bypass most Android FRP remotely $39.95 per year for 1-5 mobile devices Only available for Samsung/Xiaomi/Readmi/OPPO/Realme/Vivo at present
Samsung Online Removal Service Huaman service only, solve the problem with the help of staff $15-$50 per time for 1 device It takes a long time to wait
FRP/Google Account Bypass and Flashing Works for Samsung, HTC, MTK, MI, QUALCOMM, SPD, and many more devices Free Currently not tested with Android versions 5.1.1 and 6.0.1, and not always functional.
FRP Bypass Solutions Works with all Android devices such as Moto series, LG, ZTE, HUAWEI, Vodafone, Samsung, Lenovo, HISENSE, XPERIA, etc. $7 You need to purchase the tool to use all its features
D&G Password Unlocker Compatible with Windows 7, 8, 10, XP, and Vista Free Unavailable for LG devices
Pangu FRP Bypass tool for Remove 2017 Lollipop 5.1, Marshmallow 6.1, Nougat 7.0 and 7.1.2, and Oreo 8.0. Free Requires you to use an OTG cable with a pen drive or a computer.
FRP lock Google Verification Bypass Tool Software Additional protection for Android devices can get bypassed. Free A Wi-Fi connection or a micro USB cable is needed
Samsung FRP Helper V.0.2 FRP Removal Tools With an easy and interactive Guide. Free Combination firmware is required to run this software
GSM Flasher ADB Bypass FRP Tool Works with all OS types Free Can also act as a reactivator for lock removers
FRP Bypass APK Download Samsung for Android Effective on Samsung devices Free Play Store users cannot access this tool

The Bottom Line

The article above gives useful information on some of the important tools for the FRP bypass process. The information available is to assist the original users only who have somehow forgotten their user GoogleID/password. We hope that using any of the above methods will definitely resolve your FRP bypass issue with ease. If you also want to bypass the iCloud activation lock, Dr.Fone is of help.


  • Title: How to Bypass Android Lock Screen Using Emergency Call On Vivo S18?
  • Author: Marry
  • Created at : 2024-07-18 13:02:29
  • Updated at : 2024-07-19 13:02:29
  • Link: https://unlock-android.techidaily.com/how-to-bypass-android-lock-screen-using-emergency-call-on-vivo-s18-by-drfone-android/
  • License: This work is licensed under CC BY-NC-SA 4.0.
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How to Bypass Android Lock Screen Using Emergency Call On Vivo S18?