Mobile internet connection unstable and intermittent, most of the time not connected. WiFi works fine. The following was checked/confirmed:
- SIM card works fine on another phone
- tried both SIM slots, the same issue in both
- checked network status in the area, all mobile services normal
The mobile provider's support recommends deleting default APN setting and inputting custom APN but in this phone the system seems to automatically revert to the default setting, and I do not see an option for deleting the default APN or changing it.