Answer to: iPhone always reboots after 3 min of use, NO IMEI, NO BLUETOOTH [...]there are NOT several reasons for this (imei bluetooth AND firmware missing): It means you or someone with your iphone upgraded to the ipad baseband (6.15.00) using redsn0w in a failed attempt to unlock the phone for other Sim Carriers, and your iphone was made after week 128 (after 28th week in 2011). this is mostly the new 8Gb 3GS. Your phone is now useless because the baseband chip is deprogrammed. You will not be able to EVER install ANY baseband on these new chips again. I have heard the chip can be replaced by a process known as reflow resoldering but I have yet to see this repair done. Does anybody know the retail value of phones in this shape?
Answer to: iPhone always reboots after 3 min of use, NO IMEI, NO BLUETOOTH [...]if your 3'rd 4th and 5th serial number are higher than XX128XXX, and you install the ipad baseband, your wifi, imei, and bluetooth will be gone.