No one can hear me when I call.

If you use a vivo mobile phone, you can refer to the following setting methods for automatically hanging up when making a call:

1. If you use a telecom card, you can go to mobile phone settings-mobile network (dual card and mobile network) to check whether the VOLTE HD voice call switch is turned on. If it is, you can try to close it. Some models support the VoLTE function by default, so you can contact the telecom operator to turn it off.

2, take out the SIM card, according to the SIM card logo on the Cato, reinstall the SIM card for inspection, or replace the card slot to install the SIM card for inspection, or replace the local call to check whether the network environment is good;

3. The SIM card can be installed in other mobile phones, or other SIM cards of the same operator can be installed in mobile phones to determine whether the SIM card itself is faulty. If the SIM is damaged, it is recommended to go to the operator's business hall for a replacement card.

4. The new version of the system improves the compatibility and stability, and optimizes the performance. Please go to Settings-System Upgrade (some models are Settings-My Device -iQOOUI Version) to check the system version information. If it is not the latest version, I suggest you upgrade your experience.

5. It may be that abnormal system configuration information affects abnormal signals. I suggest you reset your mobile phone and have a look. Operation method: Go to Settings-System Management-Backup and Reset-Restore all settings. This operation will cause the logged-in third-party software account to log in again, but it will not clear the photos, videos and other files stored in the mobile phone. Before restoring all settings, please ensure that the use of some third-party software will not be affected. In order to avoid data loss caused by abnormal operation, it is recommended to back up the important data of the mobile phone first.

If the above methods are not improved, you can take your mobile phone and valid purchase voucher to the service center for testing and processing, pay attention to the official WeChat account "vivo" or "vivo customer service" to check the address and telephone number of the service center, and suggest calling before you go to ensure that a staff member receives you before you go to avoid wasting precious time.