How to solve the disconnection between card 2 and calling card 1?

Solutions include checking mobile phone settings, confirming operator support, and opening high-definition voice calls.

1. Check the phone settings: make sure the dual card settings are correct. In the phone's Settings menu, find "Network and Internet" or "Connection", and then select "SIM card management". Here, users can view the network mode of each SIM card and enable or disable data traffic and other settings. Make sure that the data connection of card 1 is not disabled when calling from card 2.

2. Confirm operator support: If the user uses two cards from different operators, it is necessary to confirm whether the operators support simultaneous Internet access and call services. Some operators may not support maintaining a data connection during a call.

3. Turn on HD voice call: If the user's operator supports HD voice or VoLTE, you can try to turn on this function on your mobile phone. This can usually be found in the "call quality" or "VoIP" options of the phone settings.