How to upgrade iOS8 1 3 official version

Upgrade considerations.

1.Friends who have jailbroken can't do OTA upgrade, it is recommended to use iTunes to update and restore firmware (method two);

The upgrade requires more installation space on the phone, so please confirm whether the device space is sufficient before the OTA upgrade. If that's not enough, you can use the sync assistant to help you clean up the junk and make room for upgrades.

Method 1: OTA upgrade, applicable to non-jailbroken users.

Method 2: Update the firmware with iTunes Recovery, which works for all users.

2.Update iTunes to the latest version and select Check for Updates in the iTunes Help menu).

3.Run iTunes and connect the device, click the icon in the upper left corner to enter the device summary page.

4.Tap Back Up Now to back up important data on your device, just in case.

5.Then press and hold Shift(Option) on your keyboard, click the [Update] or [Restore] button on the iTunes interface, and then select the corresponding version of firmware to upgrade.

It should be emphasized here that shift(option)+update, only upgrade the system, the data on the device will generally not be erased, but just in case, please also make a backup of the data.

Shift(Option)+ Recovery, which is equivalent to flashing, will erase the data on the device, and the system will be purer.

6.Successfully upgrade to, then follow the prompts to activate on your device to start a new journey.

7.At present, it is not possible to jailbreak, but synchronous push can be free without jailbreaking** genuine software. Just use Safari to access** synchronously push the genuine version, and you can enjoy massive software resources for free without Apple ID.

1. iTunes recovery mode upgrade.

3. In order to ensure that the data is not lost, use iTunes to back up the device (open the sidebar Shifts in the new version of iTunes).

Right-click on the device name in the list and select "Backup".

Upgrade tutorial (take iPod as an example, this upgrade method is common to iPhone and iPad):

1. Open iTunes and connect the device to the computer through the data cable (the new version needs to press Shifts to open the sidebar).

2. Hold down the Shift key on the keyboard (hold down the Option key for Mac systems), and click the "Recover" button with the left mouse button (please select "Update" directly for genuine systems).

4. Select "Restore", and iTunes will start the firmware update.

5. In about three minutes, the device has been restored to the system, the last step is to restore the backup data to the new system, right-click the name of the device, and select "Restore from backup.".(If you select the "Update" button, you don't need to restore the backup, you can see it after activation): Please select the time corresponding to the backup to restore.

6. Wait for the recovery backup to be completed, and then upgrade to the firmware after retaining all the data.

2. OTA update method on mobile phone:

Note: 1. Please back up your important files with iTunes or iCloud before upgrading.

2. Clean up the storage space to meet Apple's reserved space requirements. Because the iOS 8 upgrade needs to reserve enough space, the free storage space of the iPhone is at least up.

3. Maintain sufficient power during the upgrade process. Please make sure that your iOS device has more than 20% battery to ensure that the upgrade is completed smoothly.