If you travel internationally or want to use one of Sprint affiliates and want to use the LTE service, you will probably need the A1723. Most carriers use SIM cards today, as the phones become more and more general and can be used on most carriers in a particular region. 3. Be very careful about purchases from China. As for apple, I bought a device made by them so they should consider helping me so I can use this device well, otherwise my money will be lost. Different versions of the iPhone 5S iPhone 5S is a good example of a device that is packaged in multiple technologies, radio frequencies and band courses, made its hardware interoperable with multiple carrier-Netzwerken.Wenn phone has not been reported lost or stolen or in connection with fraudulent activity will Sprint customer support unlock your phone by contacting the company customer service line at 866-866-7509 or using the chat platform. What customers say: Hello John, Thank you for your expertise and, more importantly, for your kindness, because they almost look forward to my next computer problem. I have googled the model number, and it is the same for both GSM and CDMA models. But I have heard that there is another version for Verizon that is unlocked for GSM, but that the unlocked GSM model is not necessarily Verizon compatible. my question is obviously my locks 5s Verizon.Be work customer for 90 days without late payment and you can call Sprint and have them unlock iPhone for international use outside US NUR. Unlock Blacklisted Iphone 6 Plus T Mobile. Iphone 5s 64gb Unlocked Gold. Product is added and removed for many reasons but the main reason is to show that we are 0% sure that we can deliver within the promised timeline. It supports 3 TD LTE tapes 38, 39, 40 and 7 FDD LTE bands 1, 2, 3, 5, 7, 8, 20. Therefore, it can work well on China Mobile TD-LTE network, the largest mobile operators in the world is working.