All Verizon LTE phones are factory locked for GSM and LTE so it would be nice to buy one (a Verizon account is required to get it). And I have Orange Sim and it works But the problem is that the wifi does not work well. It continues to cut and ask for the password and continue and get on the phone. Is it because of your phone or router or iOS 9.1, I need your help please. For 4G compatibility, make sure that the handset you buy has radios that can adjust the frequencies that Sprint uses to deliver LTE. My Iphone 6 Will Not Slide To Unlock. This option has been available to customers in other areas since the first day, but as of today, Apple has added a new option to buy their online stores interested consumers to buy an iPhone 6 or 6 Plus, which is completely independent of any mobile operator SIM. The thing is, if you unlock all these unlocked models, you should not face a problem all over the world, but you will not get all of them unlocked.