Hello! We appreciate your interest in our products. An unlocked smartphone is a phone that isn't tied to a specific carrier or contract. Therefore, you have the freedom to shop for the latest phones and plans as often — or as infrequently — as you like. Plus, they don't come preloaded with numerous carrier applications that take up space on your phone. And when it comes to international travel, unlocked phones can't be beaten. Ultimately, we suggest reaching out to the carrier in Mexico to confirm that the device will be compatible with their network. We hope this answers your question and helps you with your purchase decision. ^Rod