Here's a common mistake that many iPhone 3GS users are complaining. They got "no service" on the iPhone 3GS after jailbreak and unlock. You should know that no service was on the iPhone 3GS is mainly due to GPS failure after upgrading to iPhone 3GS baseband 6:15:00.

Now you can ask questions about the ability to downgrade from 06.15.00 to 5.13 bandwidth to iPhone 3GS, unfortunately, the answer is no. The development team is still working on this task so do not waste your time searching on the subject. However, I'll show you how to solve all the services on the iPhone 3GS after jailbreak and unlock:

Here are some tips that can help correct any services on the iPhone 3GS after jailbreak and unlock:

Tip 1: Install the current version ultrasn0w - Ultrasn0w 1.2.3

Tip 2: Remove and then reinstall ultrasn0w: Open Cydia, search tab and type ultrasn0w> Edit> Delete, and then try again ultrasn0w and install it.

Tip 3: Reset network settings: Settings> General> Reset> Reset Network Settings

Tip 4: Remove the SIM card, then turn off your iPhone. After a few minutes, turn on the iPhone, then re-insert the SIM card.

Tip 5: Re-re-jailbreak and unlock your iPhone to be returned to pre-jailbroken custom firmware or using Sn0wbreeze Pwnagetool - here is our assistant jailbreak - Click Here.
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