Thank you for contacting.
May i know what is the firmware on the device?
Did you tried upgrading to the latest ?
Could be more specific if the there is not internet or there is internet but its slow?
Are you using both the mobile antennas ? Its recommended to use both.
If your LAN devices doesn't have internet and on mobile it shows connected , have you tried pinging 126.96.36.199 from device ?
You can check here:
Please let me know the results.