We have been getting a flood of emails lately from readers or Googlers reporting that their iPhone 3G and 3GS (and some iPhone 4) about No IMEI, No Bluetooth and No WiFi on their device.
This is definitely a hardware issue – usually a combination of a defective or corrupted baseband processor chip and Intel/Numonyx/Spansion NOR chip, baseband SRAM chip, UMTS Transceiver IC or broken micro components.
This usually happens after doing a restore, or a forced baseband update to 6.15.00 using redsn0w. In a more recent case, flashing iPad baseband will cause this problem due to a new Toshiba chip used in iPhone 3GS.
To those of you who like to scout for used iPhones on eBay, be sure to check with the seller before making your purchase. Otherwise you will end up with an expensive brick!
What are the symptoms? If you go to Settings, you will see Wi-Fi is grayed out and it shows No Wi-Fi.
Under Settings > About, the MAC address for Wi-Fi is showing is N/A while Bluetooth is showing as 00:00:00:00:00:00.
Under Settings > General, Bluetooth is shown as Unavailable.
Your iPhone will also reboot itself every 2-3 minutes.
If you can’t get your iPhone replaced at the nearest Apple Store there’s still hope of rescuing your iPhone. What you can do:
- Do a full restore with a stock firmware via iTunes
- Flash the baseband to 6.15.00 using redsn0w
- Reheat the logic board with an oven or the baseband chip with a heat gun
If the above fails then you may want to consider using our repair service.