I find that if my phone detects the in vehicle WIFI it will try to use that first. However, phone conversations are very garbled and calls are frequently dropped. I have to manually disable WIFI on the phone in order to force it to use cell towers for calls while driving. If I am using GPS for maps, I have to make sure to download the maps for where I will be driving ahead of time so I don’t use my cell data for GPS. Anyone else have 4g LTE WIFI in their car and found a way around this issue?
I believe that AT&T, who is the carrier for the 4G LTE in the car, may be blocking WIFI calling. Whenever I get in the car to go someplace the first thing my phone does is connect to the WIFI like it is supposed to but that hinders calls. So now I turn off WIFI on the phone and let it use cell towers for calls and my calls are fine.
The data plan was too good to pass up for when we’re driving places. My wife does searches for restaurants or other places of interest while I am driving so we don’t use our RW Data plan. I have also been able to access WIFI in the car on my laptop when parked someplace remote and been able to check or send email. I can also pull photos off my camera and email them out if necessary.