... iphone 4 & 4s, supports two sim cards(WCDMA & GSM), GPRS, MMS with Large back up battery capacity Apphone is one ... &4s, protection,fashion,multifunctionsupports two sim cards(WCDMA & GSM), GPRS, MMSLarge back up battery capacity, change iphone4 anytime anywhere ... Parameters:Network standard : GSM, WCDMAApplication frequency: 850/900/1800/1900MHzSize:125mm*58. ...