Thanks for the heads up. Why was he flagged? Did he call Boost and tell them that he had a flashed phone?
Phone flashing is going the way of the dinosaur, slowly but surely. Used to be that Boost didn't have any fancy phones. They were the domain of contract carriers. So you'd get a contract phone and flash it use it on Boost. But given that Boost is now carrying some pretty snazzy phones flashing is becoming a dying art.
I've declined to flash many phones for many people. One because I dont want the headache. Two because it is just too much work for not that much more gain.
You can get a bad esn Galaxy Sii for roughly $100, good condition. You'll pay someone to flash it for you, that can run anywhere from $50 to $80 or more. You'll have to find a good donor, another $20. You'll have to put up with the fact that you wont get voicemail notifications, your MMS might be wonky at times. You wont get 4g even if you live in a 4g covered area. You might save $5 a month if you're lucky enough to get a Incognito donor instead of a Prevail donor or some such.
The alternative is that you pay $250 to Boost directly, or if you hurry $200 on sale as I write this, and everything thing works out of the box. You also get a 1 year warranty. If something should go wrong you'll be able to send it back and get it fixed/replaced. Plus you'll get 4g if you're in a 4g area.
How much is your peace of mind worth?