Iphone 3gs activation problem after updating ios 5
You can also see the scheme created to solve the problem as well. There is a part of our customers who are facing No Service problem on their i Phone, especially 3GS owners with i Pad Baseband or after using Ultrasn0w unlock.Also there can be on i Phone No Service after restore or update, activation or deactivation with Redsn0w or SAM tool, even after jailbreak.If you get No Service on i Phone after factory unlocking you can fix it here.I used info here from different forums, websites and from my own experience and notes from our clients.Note: Some say that you need just reboot i Phone holding two buttons and you will get service. No Service i Phone problem can be after activating and deactivating i Phone using just app as SAMPrefs (SAM unlock tool) or Redsn0w. Insert non-AT&T Sim card in i Phone and connect it to i Tunes using USB. When i Tunes detects your device perform a backup and after backup just click Restore. Yes, it could also be a hardware issue and your i Phone has a bad antenna and it can’t catch the signal.Note: First try just Restore, without holding Shift/Option. After the process you will have service and can make calls. Very often when you try to cut the Sim card yourself many do it wrong and i Phone can’t detect the Sim. In this case just contact or go to the Apple Store and ask them to check it for you.
Also you can always contact Apple care or the carrier of the Sim card you need to use.
And remember, if i Phone got No Service issue it doesn’t mean that it is not unlocked.
Also you can try to restore putting i Phone first into DFU mode. Wait till the program finish restore and you will see two options in i Tunes: so choose Set up as a new. After installing i Phone as a new you will need to pass activation steps, so do it with non-AT&T Sim card inserted and wait for the Signal. There are many i Phones 3GS still running i Pad baseband () which you or previous user installed on i Phone for Ultrasn0w unlock. First check the baseband of your i Phone: Settings – General – About- Modem Firmware and if you see – this is i Pad baseband and you need to downgrade it. You better order the Sim of the carrier you want to use on i Phone. Sometimes there is really no service of the carrier you want to use in the area you are. If it would be antenna they would give you the new i Phone. All this info was found on different forums, blogs and from the own experience of our clients.
If nothing, read and perform methods (1,2,3,4) described above. Just try every of them and read every no service fix very carefully.
As to activation and activation you can read separate guide on how to fix activation problems on i Phone after factory unlock. In other words it is better that your i Phone shows No Service than Invalid Sim card or Sim card is not supported.
If i Phone is still locked to AT&T it will never accept other Sim.