I honestly have no idea I am not a computer whiz really. I would guess a 3G but again I am not certain. The back says this :
Distributed by UTStarcom Personal communications, made in Korea by PANTECH, FCC ID: pp4px-700, p/n : um175vw Meid Hex hope that helps It has been in my jewlery box since 2010 I know they work fine. We didnt use them that long Verizion got too expensive and we switched companies