- Reset your APN to default: Go to "Settings".
- Touch "More" under Wireless and networks.
- Touch "Mobile networks".
- Touch "Access Point Names".
- For Dual SIM: Choose the SIM card you are using for data connection
- For Single SIM: See step 5
5. Touch the "Action/More options button" top right of your phone/tablet screen
6. Choose "Reset to default".
7. Soft reset your phone/tablet: Press and hold the power button for 10-15 minutes or until your phone/tablet restart.
...DONE...