How do I restore my Android system to the original system after upgrading?

There are two ways to restore to the original system, first, directly flash the machine and flash back to the original system, and second, if the system has been backed up before the upgrade, then you can restore to the original system by restoring.

The second method provides that the original system must be backed up before the system is upgraded.

Flashing can be done by downgrading to the previous system, provided that there is a flashing package.

It seems that there is wood, and the version can only go high. It is recommended to get permission and delete the useless software that comes with the phone, which should save power. In addition, the battery doctor can reduce the frequency after obtaining permission, and it can also save power.

If you can't restore the factory settings, you can only flash the machine.

If you have a backup, just restore it directly, it seems that you shouldn't have it, then find the system package of your original model, and then flash it back.

Just do a factory reset.

If you want to downgrade, you can only flash your phone.

1.Back up the original phone system before ro0ot, and you can restore it.

2.Phone - Settings - You look for it, there is a "factory reset" on the line.

<> way to return the old version after the Android system upgrade:

1. Connect the mobile phone and computer with a data cable;

2. Enter the mobile phone setting center to open the application management;

3. Tap Mobile Assistant in the application management center;

4. In the mobile assistant, click System Update;

5. Select Switch to other versions in the system and find the old version;

6. Click Restore to roll back to this version.

Operation tool: OPPO phone.

After the phone is upgraded, it can restore the original system operation as follows:

1. First of all, open the "Settings" icon on your phone's desktop. (shown in the figure below).

4. Before doing a factory reset, you can back it up first, and then click on the "Reset Phone" option below. (The digging is shown in the figure below).

5. After clicking "Reset Phone", it will jump out of the page to enter the password, then enter the set boot password, so that the phone can be restored to the previous version. (as shown in the figure below<>).

Restore the hand to factory settings to restore the Android system to the default version at the factory.

Taking OPPO phone as an example, the method of factory reset is as follows:

1. Open the phone, find the "Settings" item on the desktop of the phone, and click to enter.

2. After entering the settings, find the "Other Settings" column in the drop-down menu and click to enter.

3. After entering other settings, find the "Restore Phone" item and click to enter.

4. After entering the restore phone, find the "Erase all content and settings" item, and click to restore the phone to factory settings, so that the Android system will also be restored to the default version at the factory.

The Android phone system can be restored and flashed, and the operation method is as follows:

1.In recovery mode, select the fourth item, FlashzipFromSDCARD;

2.Then you will see all the zip files in your card, just named mainly to facilitate the search for the rom package, find the rom you put in the sd card, click the trackball to confirm;

3.After clicking on the new ROM you want to flash, you will enter the following page, and then press the home button to start flashing automatically;

4.Don't move during the flashing process, just wait for a while;

5.When the English at the bottom of the screen and return to the recovery homepage, it means that the flashing is successful;

6.At this point, you can reboot your phone by selecting the first item in the recovery menu, RebootSystemNow;

7.Note: After flashing, it is best to reset the phone, you need to enter the fifth item in the recovery menu, wipe;

8.The first item is to restore the factory value of the phone, the second item is to clear the cache, the third item is to clear the second partition content of the SD card, the fourth item is to clear the battery usage record, and the fifth item is to clear the gravity sensing settings. After clicking on each item, a prompt will pop up, press the home button to start clearing.