Originally Posted by docfreed
Just keep airplane mode (Setttings>Wireless) on all the time - no need to ever turn it off since there really is no phone in this tablet.
That doesn't stop the phone modem. If you check the settings you will see that the device is still picking up signal from the cell towers. It just isn't connecting with the mobile network.
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HTC One T-Mobile, Stock ROM
Lenovo IdeaPad A2019 9" Tablet / ICS
Toshiba Satellite T925u / Windows 8.1