The Samsung B5722 unlocked will work on any GSM phone carrier. Unlocking a Samsung B5722 yourself can save you a lot of money versus paying for the pre unlocked version of the B5722. Furthermore, if you have already paid for the cell phone and want to switch carriers, etc, you will need to unlock the phone. Essentially, all GSM or SIM based phones come with a SIM lock on them by default. This SIM lock will prevent the phone from working with other phone carriers then the one you activated it with. This unlocking guide provides some instructions that should help you unlock your Samsung phone in no time.
First off you will need an unlock code for your Samsung B5722. Sometimes you can attain a free unlock code from your phone carrier by calling them up and requesting one. However, this is not always the case and you may need to look for a cheap one from an online vendor. Regardless, this should be cheaper then paying for the pre-unlocked version of the Samsung B5722. Here are some instructions that should help you on your way. Good luck!
How To Unlock Samsung B5722
1. Power on your Samsung phone without the SIM card in.
2. Type #7465625*638*CODE# (where CODE = your unlock code)
3. Phone will display “Network Lock Deactivated”
4. Your Samsung phone may auto reboot.