Send information only by phone and SMS.

To be able to reply to text messages and phone calls, you can first make sure that your mobile phone is normal.

Solution one. Open in turn

Settings-call settings-local number-send number to see if it is a send number.

Second, in telephone set-line switching, you usually choose to switch to line 1.

Three Settings-Network Settings-Network Selection Automatic

The above three positions are set as I said, and your mobile phone can work at least 90% immediately!