I can't find the record after I just called, and I can't see the record of missed calls. It is suggested to replace the calling card for comparative observation and eliminate abnormal calling cards. After backing up the important data files in your phone, go to Settings-Other Settings-and click Restore Phone. After the above attempts, the problem still exists. You can take your mobile phone to the customer service center for free inspection brush. You can quickly find the address and telephone number of OPPO Customer Service Center in the following ways:
1. Enter the OPPO official website-Service-Service Network for inquiry; 2. Enter OPPO+- Home-Recommendation-Customer Service-Service Network.