GSM cell phones are designed to work with any service provider. But many cell carriers "locked" the cell phone so that it can only be used on their network. This lock is referred to as a Service Provider Lock (SPL), a network lock, or a subsidy lock. When your service contact expires and you want to switch cellular carriers, you may have to "unlock" your phone. If you purchase a used cell phone, you may also have to unlock that phone.
Unlocking the mobile phone will allow you to use it on another carriers network.

Don't worry - we can help you unlock your phone.

just provide your IMEI number and we will unlock it within 48-72 hrs.

Notes: Your IMEI code is the phone's unique electronic serial number. It has 15 digits. It might be printed somewhere on the phone - probably underneath the battery. Or you can get the phone to tell you its IMEI code by keying this series of numbers into the phone - *#06#. It will then display its code on your screen.