Downgrade from 1.1.1 to 1.0.2
Step 1: First you need to download firmware 1.0.2
Step 2: Install the iphone in the docking station and wait for the phone to be detected (if it seems like itunes, close it)
Step 3: We hold down the Home and Sleep buttons for 15 seconds and wait until itunes offers to recover
Step 4: Hold down the Shift key and click on Restore, specify firmware 1.0.2, after the recovery process completes, an error pops up, do not worry, everything is fine (there may be another situation - if you specify the firmware, error 1 will crash, open iBrickr and press downgrade 1.0. 2, this option will transfer the body to a special mode and the screen will turn white, close iBrickr and perform step 4.. Now the process has started)
Step 5: Next, download AppInstaller, click Continue, select 1.0.2 and click Install. The process will go, but an error will fly out, this is normal.
Congratulations, the downgrade is done !!!