The International Mobile Equipment Identity, more commonly called the IMEI, is a unique identifier given to every phone. Mobile carriers use the identifier to keep track of devices and deny service if they’re lost or stolen. The identifier also tells the carrier whether your device is locked or not. You can use an IMEI database to learn if your phone is unlocked.
1. Go to Settings, About Phone, and locate the IMEI header.
2. Write down your device’s IMEI number.
3. Once you have the IMEI, you can enter it on a third-party website or call customer support for a network carrier (via T-Mobile).
Websites like imei24.com and network providers maintain a database of IMEI numbers and their lock status, but the method is not reliable. The customer support and website might not have your IMEI on their record, for example, and even when they do, the information could be suspect. Third-party services in particular may not provide accurate information, so the most reliable method is directly contacting your wireless carrier.