You can use a flashed phone anywhere that Cricket has their own towers running on 1900 Mhz.

To find out, type in your zip code on Cricket's website.

You can use a flashed phone if: Unlimited plans are available. If they ARE available, and you see a $35/month unlimited talk and text plan, and a $45, and $55, unlimited plan, then do the following: Click on "Coverage Maps" at the top of the screen. Type in your zip code. When you see your coverage area, see if there are diagonial lines going through it. If there are, you cannot use a flashed phone in that area. If there are NOT diagonal lines, and just green coverage, you CAN use a flashed phone in that area.

You cannot use a flashed phone if: Unlimited plans are NOT available and the highest plan is with 1,000 minutes.

Please note: You can technically use a flashed phone in these areas but it is done at your own risk with the chance of getting your account terminated. You may get switched to a different plan for excessive usage and you won't be able to change plans after that.