You can have Sprint unlock the device for you if your phone is eligible. The Sprint page shows their requirements and directions, however make sure you know if they are unlocking it for domestic or international usage, as those are different unlocks. https://www.sprint.com/legal/unlocking_policy.html You can also try it one of the services such as UnlockUnit or any number of others (haven’t used one, so can’t recommend a specific company). Those services usually have a small fee. You get the phones IMEI number (dial *#06#) and insert it into your order through the services site. In turn they send you an unlock pin. You insert a new sim card into the phone and type in the pin. Here’s some info on those type of unlocks.