Why is there echo on OPPO phone?

If you are using an OPPO mobile phone (ColorOS system) and there is noise during the call, you can try the following methods to deal with it:

1. Please check whether the microphone is blocked by foreign objects. , if there is, you can clean it and try again;

2. Since the materials of the protective shells such as electroplating, metal, and magnets have certain shielding and anti-interference properties, it will cause poor or unstable signals on the mobile phone. , if your mobile phone is wearing a electroplated soft shell or a metal protective case, it is recommended that you remove the protective case and observe whether it can return to normal;

3. If the mobile phone is in the office, residence, train, or underground When using it in certain places such as garages, there are problems with call sound, and the signal on the mobile phone is less than three bars. It is recommended that you try the following methods:

(1) Please confirm whether the mobile phone system version has been updated to the latest , upgrade the phone system version to the latest in "Settings > (About this phone) > Software Update" on your phone.

(2) It is recommended to use the original protective case of the mobile phone, and do not use metal or gold-plated protective cases.

(3) If you are in a special area (bus station, high-speed rail station, basement, elevator), the mobile phone signal will be affected. It is recommended that you leave such areas for a while and try again.

(4) If the SIM card hardware is damaged, it may also cause signal abnormalities. It is recommended that you exchange the SIM card to another mobile phone for comparison.

(5) If other mobile phones in the same area also have problems, it can be determined that the problem is with the operator's network. It is recommended that you feed the problem back to the operator for processing.

If none of the above methods solve your problem, it is recommended that you bring your purchase receipt to the OPPO official service center for inspection and processing by professional engineers.