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List of contents of this article:

• 1, How to restore the Android system to the factory default version?
• 2、How to restore factory settings of vivo mobile phone system
• 3,Casino Plus app When the mobile phone leaves the factory, which version will be the default?

How to restore the Android system to the factory default version?

1. UseThird-party flash tool: If you are an advanced user or have certain technical ability, you can use the third-party flash tool for rollback operation. This requires you to download the previous version of the system ROM package first, and then use the flash tool to flash the ROM package into the mobile phone.

2. Open the settings, click System and Update Reset Restore Factory Settings, and click Reset the mobile phone. If you have set the lock screen password, please enter the correct password and reset it according to the screen prompts.

3. Restore all settings and clear all data: enter Settings--System Management/More Settings--Backup and Reset/Restore Factory Settings--Restore All Settings, Clear All Data. Enter the recovery mode, select to clear all data, and then restart the device.

4. There are many ways to restore the factory settings: the simplest is to use the "Restore Factory Settings" function in the mobile phone settings and follow the prompts. Enter *#7780# - mobile phone soft reset (save the phone number, information, incoming and outgoing number, etc. after the machine). Enter *#7370#, the original password is 12345.

How to restore factory settings of vivo mobile phone system

Method 1: Clear all data in the mobile phone settings interface Open (settings, system management, backup and reset, clear all data), if the lock screen has been set Password or log in to the vivo account, please enter the lock screen password or vivo account password and follow the screen prompts to operate.

Operation method: Enter Settings--System Management/More Settings--Backup and Reset/Restore Factory Settings--Restore All Settings--Restore, Restore Settings Options.

You can check the following methods: restore all settings and clear all data: enter settings--system management/more settings--backup and reset/restore factory settings--restore all settings, clear all data.Enter the recovery mode, select to clear all data, and then restart the device.

Restore all settings: restore all settings in the system to the factory state, such as alarm clock, wallpaper, network settings, ringtone, etc. But the media files in the mobile phone will not be deleted.

You can refer to the following introduction of restoring factory settings or dual clearing: restore all settings: that is, restore the settings in the system to the factory state, such as: alarm clock, wallpaper, network settings, ringtone, etc. But the media files and software data in the mobile phone will not be deleted.

When the mobile phone leaves the factory, which version will be the default?

1. Xiaomi 6 comes with its own stable version MIUI 8 from the factory,Based on Android 1, the system experience is mainly discussed based on the latest stable version of MIUI 20.

2. The system version of most Apple 6s is ios9 when they leave the factory, but due to different production batches and different sales times, Apple manufacturers will also change the factory system version of the iPhone according to the appearance of the new version, and you can check their own mobile phone system version in the settings.

3. After the Android mobile phone is upgraded, after restoring the factory settings, the mobile phone will be the new version after the upgrade; the mobile phone will be restored to the initial state after the factory is restored. However, if the user updates the system, it will be restored to the updated system, not to the system when the mobile phone was purchased.

4. Restoring the factory settings will not update the system or restore the system version, and will only remain in the current version.But jailbroken mobile phones can't use this function, otherwise it will be white.

5. Take Xiaomi mobile phone as an example, it will default to be the stable version of miui9 when it leaves the factory. MIUI9 has greatly improved system stability, fluency and battery life. The newly released portal, information assistant, photo search, split screen and other functions in 2017 focus on improving the efficiency of mobile phone use.