Hi, yesterday I bought a jailbroken and unlocked 16GB 3GS from someone to replace the 3G I have. The phone was out of battery when he brought it (he claims it's been sitting for a while). So we waited for it to charge a bit until it booted up, then inserted my sim and tested a call and I checked other stuff playing around with it a bit. Everything seemed fine except it rebooted itself all of a sudden, at that point I thought it was because of the very low battery level (now I think of it, it shouldn't do that). When it was booted back up I continued to check a bit and it seemed ok so I payed him and put it to sleep and went home to plug it on charger and left it. When I returned a couple hours later the battery was showing full when I hit the sleep button to wake it. I started going through the phone now and all a sudden it rebooted itself again, played with it a bit and rebooted itself again, except this time it was stuck at the apple logo for a long time. I tried holding the power and sleep button to force reboot it but it seemed to be either stuck on a black screen or at the apple logo and iTunes complains for phone in recovery. Tried Recboot to kick it out but doesn't seem to respond. I forgot to look at the firmware version but I remember the baseband is on the iPad 06.15.00 Now obviously i want to know how I can / if I can fix this, and re-jailbreak/unlock it. But i'm not sure if the shsh blobs are saved or for which versions. If I have no option I don't mind reverting to stock firmware, but I read somewhere from before that if the BB is updated to 06.15.00 the phone can't be restored to stock firmwares? What are my options here? I'll try contacting the person to see if he knows what version the phone is on and if the blobs are saved, but thats if he would reply me (thats if he did know this phone was problematic). Thanks for any help in advance, this is very disappointing.