Step 1: Purchase activation
Step 2: After getting instruction please download iActivate app for Windows or Mac OS
Step 3: Device must be turned ON and not activated on “MDM Login Screen” screen
Step 4: Connect device to Windows pc and allow iTunes to detect it. Click “Trust This Computer” on the device.
Step 5: Install and Run iActivate. You will see details of your device like IMEI, Serial and UDID, iOS version. This means that our soft successfully detected your device.
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Step 1: Make fresh backup of your bypassed device using iTunes or any other 3rd parties software like ibackupbot. Here is a full guide on how to update MDM device without relocking.
Step 2: Download new iOS firmware to your PC.
Step 3: Update your iDevice using iTunes.
Step 4 (pay attention): After your device has being restored click on “Recover device from backup”. Choose backup you created at step 1 of this section. After restore from backup completed your device should be running latest iOS free of device management.