Hi bigbamabuddha. My name is Straight Talk Charisse and I will be addressing your question. The LG Optimus Quest, LG Optimus NET, LG Optimus Q, LG Optimus Black, Huawei Ascend, Motorola Defy XT and Samsung Galaxy Precedent, use Sprint Prepaid network. Phone models that end in C (CDMA), Samsung Galaxy Proclaim, LG Optimus ZIP, Samsung Galaxy S Showcase, Unimax U670C, Huawei Ascend Y and LG L38C use Verizon network. Phone models that end in G (GSM) use either T-mobile or AT&T. Nokia smart phones, ZTE Merit, Samsung Galaxy S II, LG Optimus Logic, LG L40GU and LG L96G use AT&T as the carrier. Thanks.