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Discuss iPhone 4 Carrier / Cell Signal Issue at the iPhone 4 -; Just wanted to share my findings in case it can help someone with a similar ...
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    Default iPhone 4 Carrier / Cell Signal Issue

    Just wanted to share my findings in case it can help someone with a similar issue.

    I recently updated my phone from 4.0 to 4.1 using Tiny Umbrella to prevent the baseband update. My phone is locked to a carrier different from what I use. I Jailbroke with Limera1n and then unlocked with ultrasn0wn 1.2 ( This is where I ran into intermittent issues with cell signal. It started out working fine and then I would loose all cell signal. When I turn on / off airplane mode I would get "Sim Failure". I had my sim replaced but that didn't help.

    I ended up removing ultrasnow 1.2 and then installing ultrasn0w 1.1-1. It has been working good for about 3 days now.
    Last edited by Olethros; 12-13-2010 at 09:25 AM. Reason: removed reference to warez repo



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