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No service on iPhone 3g after updating to 4.2.1, help!

asked 13 Feb '11, 20:07

bugg's gravatar image


edited 14 Feb '11, 14:25

gomanski's gravatar image


Were you previously unlocked?

(13 Feb '11, 20:15) gomanski gomanski's gravatar image

Yes, and everything worked fine for 2 years

(13 Feb '11, 20:20) bugg bugg's gravatar image

My firmware is 05.14.02 which I am now seeing in other threads online may not be compatible.. ughh..

(13 Feb '11, 20:35) bugg bugg's gravatar image

Should I update my baseband to 06.15.00? What are the downsides?

(14 Feb '11, 14:10) bugg bugg's gravatar image

Downsides include the possibility of Bluetooth and GPS not working. Also, it makes it EXTREMELY obvious to Apple that you hacked it, therefore you lose your warranty. And there is no way to reverse it.

(14 Feb '11, 14:12) mdelaossa mdelaossa's gravatar image

I don't have a warranty anyways, I bought the phone online almost two years ago. I do use bluetooth all the time, so that would be bad to lose. Is there any other way with 05.14.02 to get service??

(14 Feb '11, 14:13) bugg bugg's gravatar image

No, I'm afraid not at the moment. You can either wait for a possible unlock for 05.14.02 (no ETA is provided, though it may be coming soon after iOS 4.3 is released), or use 06.15.00. I think bluetooth issues have been much rarer, however.

(14 Feb '11, 14:20) gomanski gomanski's gravatar image

PS - if your 3G is old enough, and still has bootloader 5.8, you can follow this guide to downgrade to 05.13, which is unlockable using ultrasn0w:

(14 Feb '11, 14:26) gomanski gomanski's gravatar image

Unless you upgraded to 4.2.1 using a custom firmware from PwnageTool to preserve your baseband, 4.2.1 will have updated your baseband to 05.14.02 or 05.15.04, neither of which are currently unlockable.

Your options at this point are:

  1. IF you have an iPhone 3G with Bootloader 5.8 ONLY, you can follow this guide to downgrade your baseband to version 05.13.04, and unlock with ultrasn0w; this method will preserve GPS and bluetooth without problems.
  2. Wait for a possible unlock on 05.14.02 (No ETA is known, but there may be an unlock after 4.3 is released)
  3. Upgrade to the iPad baseband 06.15.00 and risk losing GPS functionality or encountering errors with Bluetooth.

If you absolutely must have your unlock, follow one of the guides below:


answered 14 Feb '11, 14:23

gomanski's gravatar image


edited 14 Feb '11, 14:27

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Asked: 13 Feb '11, 20:07

Seen: 12,143 times

Last updated: 14 Feb '11, 14:27

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