cell phone for mavic

If I use a cell phone to control my mavic (as attached to the drone controller using the usb cable), will it work if the cell phone does not have data (aka Wifi or 4G LTE)? Its a silly reason why I ask: I got a new cell phone and thought I might dedicate my old one for using the drone. But it...

I have been flying my Mavic with an old Samsung S4 which my daughter gave me but the battery is failing. This phone works fine with either the DJI GO or DJI GO 4 app. I also have flown with my Samsung S3 with mixed success. The battery in this phone is near end of life, the DJI Go 4 app...