In this article, we discuss how to downgrade iOS 10.2.1 to iOS 10.2. Users all over the world have reported numerous problems in the iOS 10.2.1 update. Problems in iOS 10.2.1 include those related to connectivity, such as Bluetooth and Wi-Fi. Along with that, UI crashes and random reboots have also been reported.
Apple hasn’t solved the ‘30% battery bug’ either. The 30% battery bug has been affecting users of iPhone 6S and others. As soon as the battery level hits 30%, the device shuts down. Apple was expected to come up with a solution for this problem and release it in the iOS 10.2.1 update. However, the users were disappointed to see no such solution being incorporated.
If you also run into troubles with the iOS 10.2.1, one option is to downgrade to iOS 10.2.
This option to downgrade to iOS 10.2 from iOS 10.2.1 will not be available for a very long time. Typically, Apple will stop signing any old firmware within two weeks of the release of the new update. If you are toying with the idea of downgrading to iOS 10.2.1, you should decide fast.
In a few days, it will be impossible to downgrade to iOS 10.2 as Apple will stop signing off on the update.
The upgrade procedure that is built into all the iOS devices ensures that Apple is still allowing the concerned firmware to be installed.
Although there is no ‘official’ way to install an older firmware, the process is quite easy. Let’s take a look at the steps you will have to follow to downgrade to iOS 10.2 from iOS 10.2.1. Note that currently, iOS 10.2 is the only ‘old’ firmware you can install. It is impossible to install iOS 9.3 or iOS 9.2.
Taking a backup of your device before installing iOS 10.2
Before you start the process of downgrading to iOS 10.2, you should make a full backup of your device. You won’t be able to restore your files from an iOS 10.2.1 backup. However, this backup will serve as a safe point in case things don’t go the way you expect them to.
You can make this backup using iTunes. You can back up your device either locally, or to iCloud. Once you have downgraded to iOS 10.2, you will be able to restore data only from an update that was released before iOS 10.2
Downloading iOS 10.2 Firmware
Next, what you need to do is get your hands on the firmware file that you want to install.
You can find the IPSW Firmware file here. Make sure you download the correct file depending on the device you are using and your region. Also, check whether Apple is currently signing the update. This will be indicated by a green checkmark in the related column.
Once you have downloaded the IPSW update file for iOS 10.2, proceed to the next step.
Installing the iOS 10.2 Firmware
Connect your iPhone, iPod or iPad to your Mac or PC using the Lightning Cable. Before you start the installation process, make sure that ‘Find my iPhone’ is turned off.
Next, click on your device in iTunes and it will take you to the device summary page.
On this page, you will see an option labeled ‘Restore iPhone…’. You need to click on this. On Mac, you will have to hold the alt/option key while clicking. On Windows PC, you will have to hold the Shift key while clicking.
Once you hold the respective key and click, a dialogue box will open up, asking you to pick the IPSW Update File to use.
Find the file that you downloaded in the previous step and click on ‘open’. iTunes will display a warning saying that your device will be restored, all the data will be wiped, and the update will be confirmed by Apple.
Hit ‘Restore’ to start the downgrade process.
After the installation
Once your phone has downgraded to iOS 10.2 and has finished booting up, you can restore from a backup that you made before installing iOS 10.2.1. Any backup that was made before installing iOS 10.2.1 can be used – irrespective of whether it is stored locally or on iCloud.
Alternatively, you can start using the iPhone running iOS 10.2 as a new device.