After the X7 upgrade system, the system often freezes, can the original system be restored by restor

After the system is upgraded, restore the factory settings, it is still the upgraded system, if you want to restore the previous system, you can go to the after-sales service to flash the machine.

No, it's an upgraded system.

If you are using a vivo phone, a factory reset will not reduce the system version of the phone.

After the phone is factory reset, the system version is still the system version before the factory reset, and will not be restored to the version before the machine upgrade. (The phone does not support downgrading).

It won't change, I regretted the upgrade, I wanted to go back, and then I tried it, but the result was still the upgraded system, and I was angry.

No, you can only change to the original version by flashing your device.

No, a factory reset is just to erase your phone data and restore various settings to default, and it will not affect your phone system, but it should be noted that you should back up your phone data before factory reset to avoid data loss.

Here's how to back it up:

1) Open [Settings] and enter [Other Advanced Settings] -- Backup & Reset;

2) Click to enter [Local Backup].

3) Click [New Backup] and select the content to be backed up

4) Click Start Backup and wait for the backup to complete.

Hi!1. After resetting the factory settings, the system will not return to the system before the factory, or your current system version.

2. Your phone has been granted root access, and it will not be able to be used normally if it is not used properly.

3. Because your phone has obtained root permissions, it may not be able to upgrade the system normally, and there will be problems with application upgrades.

..Hello.

After the phone is factory reset, it is to restore to the last upgraded system of your phone, if you want to downgrade the phone, you need to go to the Samsung designated service center to rewrite the lower version of the system implementation.

Hope the above reply helps you!

What should I do if the electric knowledge excitation brain runs slowly, and the card will not be reinstalled?Then try this one-pair sock key to factory reset.

Enter this link, click "Service" - search for your phone model in the search box, then select the model, click on the resource ** - firmware upgrade for the **ROM package.

This is the tutorial, you can take a look. Instructions for firmware upgrades.