LTE frequencies are often referred to as LTE bands. To use a smartphone in a particular LTE network, this smart phone has the support of the LTE network frequency. Note that Apple standard warranty on the Internet is valid only in Kaufland, except for the European Union. If you purchased iPhone at an Apple Store or Verizon store, Big Red is not preventing any 4G LTE devices so no code is required to open iPhone If you buy the device directly from a particular carrier, but buy it from a dealer like Amazon or Best buy and it a particular carrier, it most likely a mobile operator to lock some operators they sell, but they can take you on to their service plan, which makes no sense when you think you have unlocked the phone to avoid this kind of dedication at all. Network service providers sell locked phones because they want you to use their services only and not switch to other vendors when the offers return. If you travel abroad, you can buy a local SIM card and save on roaming charges. Kijiji Iphone Unlock more. 3. Increase the resale value of your device as it is available to multiple vendors. Follow these links to unlock the policies of any of the major service providers: Verizon: Does not lock 4G LTE devices, and no code is required for programming them for use with other cars. Buy An Unlocked Iphone 7 Plus on this page. All CDMA phones are shipped to a particular network, and you need to get your old vehicle and your new carrier to work together to switch phones between them. I have activated the phone with the TracFone BYOP (Bring Your Own Phone) application, which I had to purchase an activation set that included Nano SIM for both GSM and CDMA.