1. Press the volume key "+"and the power key to enter the recovery interface.

2. Select the language you want, and then select "Clear Data".

3. Select "Clear All Data" and press the power button to confirm.

4. Press the power button and select the "Confirm" option to clear the data.

5. This operation will erase the related data in the ROM, so please make a backup.

6. Enter Recovery and select "Install Update. Zip to System1".

7. Click "OK" and the system will refresh. 8. Enter "Reboot" and select "Reboot into the system 1".

Credit card Root permission:

Well, it depends. Different mobile phones have different situations.

1. Some mobile phones have their own recovery. This recovery has the basic function of swiping cards, that is, double wiping, loading zip packages, and all advanced functions are complete. This kind of mobile phone does not need root. Just download the firmware package to the sd card and press the key combination to enter recovery to swipe the card.

2. Some mobile phones can't be used. This kind of mobile phone is generally either officially recycled or officially restricted to prevent users from modifying it (Samsung mobile phones are more common); Or some recovery modes of some brand machine manufacturers (but not recovery, can not be refreshed), which need third-party recovery to achieve the purpose of refreshing cards.

There are two ways to swipe in: mobile phone swiping and computer swiping. Twrp mode is common in mobile phones. You need to download a corresponding model of twrp after the root mobile phone, and load it into the mobile phone after obtaining the permission. With the help of some official tools, the computer can achieve the purpose of direct input, without root, and connect the data cable to brush it in.