Regular Sim Card 3g Unlocked Any GSM Carrier Desbloqueados GSM (Not Verizon Sprint Net10 or Any CDMA Carrier) Bands: 3G 850/1900 mhz 2G: 850 / 1900MHz. US compatibility Nationwide on all GSM Networks including AT&T, T-Mobile, Cricket, MetroPCS, Straight Talk, Pure Talk USA and others. Worldwide usage as well