A locked phone means that you're only able to use it with a SIM card from the carrier that originally sold the phone. If you originally purchased your device from a carrier at a discounted price, it's likely locked to that carrier.
If your phone is locked, you still have options:
Find an unlocking service
For most phones you can use a third-party unlocking service to unlock your phone. Typically an independent mobile phone store or an online unlocking service will work.
It works by sending them your device IMEI (it's like a unique barcode for your phone) and they will send you back the unlock code and instructions.
If you prefer to have your phone unlocked in person, visit a local cell phone repair shop. Many offer unlocking services for most phones, but it’s always a good idea to call ahead to make sure they can unlock your specific make and model.
Contact your current wireless provider
Your mobile provider will unlock your phone for a small fee. Certain conditions may apply. Contact them and ask for a phone unlock.
If you purchase an unlocked Samsung device from Costco, Staples, or another third-party retail location, please click here for more information on using your Roam Mobility SIM card with this device.