This carrier restricts how many devices you can unlock in a 12-month period, which can create problems for those on a family ...

While the best unlocked phones almost certainly support GSM carriers like AT&T and T-Mobile, it’s best to look for devices that work with all the major U.S. providers, including Verizon.

For T-Mobile it’s 40 days ... (Note that the company cannot unlock phones purchased from a different provider or company. The device could be locked by the other provider, not Vodafone.) ...