Purchasing an iPhone from a carrier is convenient, but it has its drawbacks. With the exception of Verizon which does not lock their 4G phones, most carriers, including Sprint, lock the phone to their network, forcing you to use your iPhone only on their network. If you want to switch, you have to meet certain minimum requirements and jump through hoops to get the carrier to unlock the phone. Reason 5 Keygen Only. Autodesk Autocad Keygen more. Though not as easy as Verizon, Sprint is fairly flexible when it comes to unlocking your iPhone. Read on to find out how to unlock your iPhone if it is currently tied to Sprint. Do I Need to Unlock my Sprint iPhone? Unlike Verizon, which has the most simple unlock policy (all phones are sold unlocked), Sprint has a confusing policy with different rules based on when you purchased your phone. If you purchased a new iPhone after February 2015, Sprint automatically unlocks your iPhone for domestic (within the US) use when it becomes eligible. What Does Factory Unlocked Iphone Mean.