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.