Who uses CDMA Phones – how to use almost any cdma android phone on a gsm network! so pretty much this video says a couple tips when buying a cdma phone which are phones that don’t use sim cards. cell phones tips : how to use any cdma phone for metro pcs. gsm phones are phones that use sim card (t-mobile at&t/cingular) cdma (verizon sprint). use any cdma phone for a metro pcs by using houdini soft software to flash the phone over to metro.