How to set dual card for vivo mobile phone

How to set the SIM card of vivo smart phone: Go to Settings-Dual Card and Mobile Network-Dialing and Information, and select the SIM card to use in the Dialing and Information interface.

Specific operation steps (taking vivo X20 as an example):

1, standby desktop click setting

2. Dual card and mobile network

3. Find dialing and information

4. Open the dual-card settings for dialing and information.

Note: vivo mobile phone does not support using two telecom cards at the same time. If two telecom cards are inserted, one card cannot be recognized.