Downgrade baseband 6.15.00 on iPhone 3G and 3G

Dev Team has done to release a new version of RedSnow that allows the execution of the procedure to downgrade baseband 6.15.00 devices installed on iPhone 3 G and 3G simlocked foreigners.

Recall that this procedure has been issued to remedy the problems caused by the installation of the baseband, originally iPad, iPhone on foreigners in order to facilitate the unlocking of the baseband and its use with any SIM provider. Now you can return to a previous baseband with a new version of redsn0w 0.9.14b1.

This procedure will then go beyond to a previous baseband unlockable also overcome the loss of GPS on their devices, thus recovering the feature. So you can go back to baseband 05.13.04 even if you never had it installed previously and provide baseband to unlock using UltrasSnow no longer going to lose the GPS functionality. Here are the steps:
  1. 05.13.04 RedSnow you download directly from the following link Windows version - the Mac version;
  2. Go to menu "Extras> Select IPSW" of Redsn0w and select the firmware version you have installed on your iPhone (users holding an iPhone with new bootrom can skip this step);
  3. Normally turn off your iPhone ("Slide to power off." This step is crucial to avoid problems with the ramdisk during the process;
  4. Return to the home screen and click on "Jailbreak". Enable the option "Downgrade baseband from iPad", off installing Cydia if you have previously installed and click Next to proceed in the normal procedure that asks you to set the device in DFU mode.
Now you should see the logo of the classic pineapple RedSnow and you receive the message "Flashing Baseband", this step takes several minutes and the device does not give any message. Wait between three and eight minutes, when the ramdisk will have completed its work, the iPhone will reboot automatically.

For those in the previous baseband 05.13.04 can be updated to 6.15.00 and then downgrade, but be careful that this procedure can make sure all owners of iPhone 3G and iPhone 3G owners of old boot, boot, or those with new iPhone model produced by the 34th week of 2011 onwards can not perform this procedure because they would lose the possibility of unlocking permanently. To recognize new or old boot you can see the machine's serial number, if you have "xxx134" you should not perform this procedure Jailbreak Apple TV 3 .

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