So CTWAP can't surf the internet, and it must be changed to CTNET. See how to change the phone.
My mobile phone can be changed directly in the status bar. You have to look at your own situation.
If it's a mobile phone or Unicom phone, look for two formats with a NET suffix, such as CMNET for mobile.
If you don't understand, sincerely welcome questions; If I am lucky enough to help you, please adopt in time! thank you