As we knew, Verizon committed that 5c/5s is unlocked and can be used local carriers SIM card which supports GSM or CDMA while roaming out of US. Recently some friends told me that their 5s is out of service inserting local CDMA carrier SIM card china telecom in China but works with local GSM carriers SIM card. Does anyone know why it happens? Is it meaning Verizon change their policy not allowing other CDMA carrier service works at 5s? Anyone else know the same issue at other area?