1. Download the corresponding rom system firmware in XDA forum. The advantage of going to the forum is that you can download the latest version of the system (such as the rom system firmware of Android 4.0). Software such as "Sweet Pepper Brush Assistant" is often slower than forums, because there are too many enthusiasts in the forums.

2. Install the "Pepper Brush Assistant" on the computer. After the installation, connect the data cable of the mobile phone to the computer. When the "Device Connected" is displayed in the lower left corner of the "Pepper Brush Assistant", execute the "Utility" and click "One Button Unlock for Pepper". After unlocking with one key, click "permanent Root" to end Root, and then click "refresh and restore" to stop it.

3. Click the "one-button brush" at the top of the "Sweet Pepper Brush Assistant" program, click the "Browse" button to select the rom file you downloaded in step 1 (remember, the rom file can only be in zip format, if not, you may have downloaded it by mistake), click the "Start Brush" button, and the brush is finished here. For non-HTC models, please look down.

4. Some people may not be HTC Android phones. First, copy the rom file you downloaded in step 1 to the root directory of your mobile phone's SD card, execute step 2 (remember to click "Brush in to restore"), skip step 3, then click "Use Tool" at the top of "Pepper Brush Assistant", click "Enter to restore", and press "+"-"of the volume of your mobile phone to restore it up and down. Select the updated system, select the rom file you copied in the SD card, and press the power button of the mobile phone once to brush the machine (when you press the power button of the mobile phone for the last time, you can directly unplug the data cable to disconnect the computer, and the mobile phone will automatically install the rom system and restart it).