Hey Zukcy, go to Settings > More... (under Wireless and mobile networks) > ... make sure 'Data enable' is checked or active. Let us know should the issue persist in spite enabled data connection. The last time we dealt with this issue on one Mobicel Cherry, performing a factory reset is what finally worked when all other attempts were to no avail. But resetting the APN to factory defaults was never tried and may possibly help/work. So do: Settings > More... > Mobile Networks > Option/Menu (the 3 dotted soft button) > Reset to default > then press and hold the Power button until the tablet shuts off and restart. If that does not work, then you will need to backup what you can and reset the tablet factory defaults. Resetting is: Settings > Backup & reset > Factory data reset > Reset tablet...