I'm not a customer of the big four (Verizon, AT&T, Sprint, T-Mobile). I want to pre-order a T-Mobile phone, throw away the T-Mobile sim, and put in a sim card from my carrier, Cricket. Will Apple accept my pre-order? --- Post Merged, Sep 8, 2016 --- I chatted online with Apple. They said: "If you buy the T-Mobile iPhone it would be unlocked for use with other supported carriers too. It will not work on Sprint or Verizon wireless though." And: "We offer the T-Mobile iPhone with no plans attached. So it won’t request your account information to pre-order that version."