Signal Issue

Weak signal/No signal/ unstable signal

Step 1 Data network settings

Please check if the mobile data has been switched on.

Yes

Please reset the access point name or try other sim card

1、If the mobile data status is enabled, please reset the access point name settings-SIM card&moible data-SIM-Access point name-click the ":" icon at upper right corner to reset access point
2、Please try with other SIM card to see if this issue is caused by the carrier.

No

Jump to step 2

Step 2：Confirm the system version

Has the system of your handset been updated to the latest version?

Yes: Settings-Software Update-Latest Version

Jump to step 3

No: Settings-Software Update-Prompt for Version Update

Update to the latest system version

The update of the system version will optimize the mobile phone signal, improve the network search ability, but also improve the compatibility of some regional networks. Therefore, we recommend that you first update the mobile phone version to the latest and see if it can solve your problem.

Step 3 Confirm the place of use

What is the certain place when the problem occurred?

Bus station, classroom, stadium, basement, underground garage, elevator, high floor, on car, train, high-speed rail

From inside a building with thick walls or of mostly metal construction (or with dense rebar in concrete), signal attenuation may prevent a mobile phone from being used. Underground areas, such as tunnels and subway stations, will lack reception unless they are wired for cell signals.

leave that area and ty restart the handset or swith on/off the airplane mode

The signal strength  It is recommend that you leave that certain area to see if the problem can be solved, if that issue still occured, we suggest you go to the service center.
.

shopping mall, office, apartment,etc

It is recommended that you cross check the SIM card and handset to determine whether the problem is caused by the SIM card

If the problem is caused by the SIM card, it is recommended that you contact the network carrier to solve, if it is caused by the handset ,we suggest you go to the service center.

Step 4： Send for repair/inspection

Sorry for bringing you a bad experience. Please bring the purchase invoice, warranty card and mobile phone to the OPPO customer service center for testing. Our professional engineer will help you solve it. Would it be convenient for you to come?

Send for repair

If the user is willing to come, you need to proactively inform the user that there is an appointment service, and remind the backup data