Note: Not all cell phone companies use the same technology to provide service so there's a chance your phone will not work with every SIM card.
When you return to the U.S., simply swap the international SIM with your Cricket SIM and your cell phone should work as usual. You can temporarily replace your Cricket SIM card with the local service SIM card. Unlocking your phone allows you to use the local wireless service by purchasing a SIM card from a local company while overseas. One common reason to unlock a phone is international travel.
