Only works for GS4 GT-I9505 will not work with Sprint SPHL-720, From what I hear the GSM radio is not turned on in the 720 although the phone detects the card the radio is off by Sprint. Sprint also says that the sim card is for LTE only..(lie) and in the same sentence they say it can use GSM network if I was to travel to Mexico. Somehow you must activate the gsm/umts radio. This is a software problem. Read the box of the SPHL-720 it states it is an/and uses GSM/UTMS device/service.
