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It could be that there is a problem with the phone. Here are two things you can try:
Go to Settings - Other Settings - Restore - Erase all app data and uninstallable apps, this operation only retains the data saved by the user, such as **and**;
Go to Settings - Other Settings - Restore - Erase all content and settings, you can restore factory settings, this operation will erase all data, including**and**, please back up important data in advance.
What to do if the factory reset fails:
If the factory reset fails, it is recommended to back up important data first, press and hold the power button and volume down button of the phone at the same time when the phone is turned off, and then select Clear Data and Cache to perform a double clearing operation after entering the recovery mode;
If it still can't be solved, please bring the purchase invoice, warranty card and mobile phone to the nearest OPPO customer service center for testing and processing.
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Dear, you can try Shuangqing, the operation method of Shuangqing on mobile phones:
After the phone is turned off, press and hold the power button and the volume down button at the same time for about 5 seconds, enter the recovery interface, select Chinese Simplified, and then select "Clear Data and Cache" by volume plus key and subtraction key, select "Clear user data and cache", and then press the power button to confirm, and choose to restart the phone after the operation is completed;
Note: Shuangqing will erase all the data in the memory of the mobile phone system, including: **book, contacts, SMS MMS, notes, personal account information, **third-party applications, so please be sure to back up important data before operation.
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A factory reset will restore your phone to the state it was in when it first left the factory.
If you want to downgrade the system version of your mobile phone, you need to back up your mobile phone information (**number, SMS, **, etc.) and then bring your mobile phone, purchase invoice and warranty card to the nearest OPPO customer service center to be handled by the engineer.
How to backup and restore your phone.
Restore your phone. You can do this by following these steps:
1. Go to the phone Settings > Other settings > Restore the phone, you can choose the following options when restoring the phone, it is recommended that you choose according to your personal needs:
Reset System Settings Only (Reset System Settings): Only the settings for your phone are cleared, and your saved data will be retained, such as ** and **, etc.
Erase all data (erase all content and settings): Erase all data, including ** and **.
Erase phone contacts and call history (erase phone contacts and call history): SIM card contacts are retained.
Clear SMS & MMS (Erase SMS & MMS): SIM messages are retained.
2. In order to ensure the security of personal information, if the mobile phone has set a lock screen password or logged in to the mobile phone account, when selecting the above options to restore, you need to verify your lock screen account password (you need to keep the network connection when verifying the account password), enter the correct password, and follow the on-screen prompts to operate.
Note: If the phone is set with a lock screen password and logged in to the mobile phone account, some models need to verify your lock screen password first and then verify the account password when restoring the factory, which is subject to the prompts on the mobile phone page.
If you forget the lock screen password or mobile phone password, you can bring the relevant ID documents and purchase vouchers to the local official customer service center to ask a professional engineer to flash the machine Note: The data may be lost during the flashing process.
Tips: 1. For mobile phones with ColorOS system, go to Settings > Other Settings > Restore Phone, you can only choose to reset all system settings, erase all content and settings, erase mobile phone contacts and call logs, erase mobile phone SMS and MMS items;
2. For the phone with ColorOS system, go to Settings > Other Settings > Backup & Reset (Restore and Restore Phone), you can choose to erase all app data and uninstallable programs, erase all content and settings, erase phone contacts and call logs, erase mobile phone SMS and MMS items;
3. For mobile phones with coloros and below systems, go to Settings > General > More > Factory reset > Reset phone to reset, the default initial password of factory reset is 0000, if the lock screen password is set, the factory reset password is the lock screen password.
Note: This applies to all OPPO models.
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If you want to know how to restore the factory settings of your phone, the following will introduce you to the operation method, I hope it can help you
You can go to your phone's Settings > System Settings (Other Settings) > reset your phone (Reset your phone) and clear the corresponding content according to the prompts on your phone.
If the phone has a lock screen password, you need to enter the lock screen password to verify before clearing the phone data. )
Reset Wireless Settings: Reset only WLAN, Bluetooth and mobile data.
Restore System Settings Only: Restore only system settings (all system settings in Settings).
Wipe all data completely: Erase all data from your phone, including ** and **) and reset system settings.
Clear phone contacts and call history: Only the phone contacts and call history are cleared, and the SIM card contacts will be kept.
Clear SMS and MMS: Only clear SMS and MMS will keep the SIM card SMS.
If you have previously backed up data through the Settings System Settings (Other Settings) Data Backup and Migration (Backup & Restore) function, it is recommended that you copy the data to external storage or a computer for saving.
This is available for all OPPO models.
Material Tool: OPPOA37M
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