You can always get your iPhone unlocked from T-Mobile if you want the ability to change SIM cards or carriers. Not all carriers will accept every unlocked phone, though, so if you already know which carrier you want to switch to, check with them to make sure your iPhone will work on their network. • • What are the requirements to unlock on T-Mobile? Like all service providers, T-Mobile has certain conditions, restrictions, and various other requirements you need to fulfill before you can request an unlock code for your iPhone. How Much Is An Unlocked Iphone 5s Worth more. Best Video Editing Software For Pc Free Download Full Version. Here's a rundown of T-Mobile's unlock requirements, as stated by T-Mobile: • You have to have bought your phone from T-Mobile. • Your phone can't be reported as lost, stolen, or blocked to T-Mobile. • Your account with T-Mobile cannot already be canceled and it must be in good standing (meaning that if you haven't paid your bill in three years, you're probably not getting unlocked).