Why are there no calls or text messages when my phone is on volte?

It is because the mobile phone has volte turned on, but the mobile phone card has not opened this service or the local area does not support this network, so it will be displayed like this. Turning off volte can solve the problem; the specific operation method is:

1. First, we click on the settings on the phone.

2. Then select dual SIM card and mobile network.

3. Then we select the mobile phone card with this phone number and the cross icon. This is a telecommunications card, and this is generally the case.

4. Then turn off the option to enable VoLTE high-definition calls.