How to use CallApp with a dual sim?
CallApp does support Dual SIM cards.
Please verify that you have properly inserted the 2 SIM cards.
In order to change the name of the SIM, you need to change it first on the device’s settings.
In order to change the SIM priority, please go to the side menu – Settings – General – Set sim Cards priority.
You can choose which SIM card you would like to make the call with.