@New-Life 

Good day,

Thank you very much for your time and patience.

Sorry for the delay.

May I know where are you located and who is your sim card provider？

How long have you had the device and when did the issue start?

When the connection dropped, the device was already disconnected from the Wi-Fi or still connected but no internet?

And how would you recover the internet connection, reboot the M7350, or it would come back automatically？

Have you tried to change the wireless channel on the 2.4ghz to have a look？

Thanks a lot.