Gmaps WV does use your location. It should prompt you to allow location when you tap the bullseye icon. It doesn't do spoken turn by turn navigation, however.

CDMA and GSM are both dead in the US. However MVNOs, who contracturally not allowed to mention the name of the MNO they operate on, have adopted the convetion of using CDMA to refer to Verizon and GSMT or GSMA to refer to T-Mobile or AT&T.

IPhone SE 2020: Tracfone and Dent
Pixel 3 XL: MobileX

Tracfone (AT&T SIM) is my main provider. It has been very reliable which is good because support is useless.

I use Dent for free data that you earn by watching ads. When I had an issue with missing promotional data CS fixed it promptly. There are a lot of outages but I have Tracfone to fall back on.

I'm trailing MobileX has a possible replacement if Tracfone goes FUBAR. It mostly works. I've had issues with the app and with outages but support has resolved them competently and quickly.