How to downgrade (or upgrade) to iOS 10.2
Famous hacker Luca Todesco finally released an update for yalu102 that allows you to jailbreak iOS 10 on 64-bit devices. With the iPhone 7 you can only use it on iOS 10.0, 10.1.1, at the time, like all the other 64-bit devices are compatible with iOS 10.2. In this article we will talk about whether to do a rollback to iOS or Vice versa 10.2 to upgrade from an older version of the system.
Now if your device is running iOS 10.2.1, or 10.3, but you need a jailbreak, you must downgrade. If you are using an earlier version of iOS, you must upgrade to 10.2. It should be borne in mind that if you have an iPhone 7 or iPhone 7 Plus, then go to iOS 10.2 it is impossible in any case, since now on the flagship smartphone of Apple, it is impossible to jailbreak.
How to roll back or update to iOS 10.2
Step 1: make Sure you have a recent backup and you saved all the necessary data. If you are performing a downgrade from iOS 10.2.1 to 10.2, restore the data will not work.
Step 2: Download the required IPSW file iOS 10.2 for your device. For certain smartphones there are different IPSW, so be careful. For example, the iPhone 5s is the GSM version, but a global one, but they are not interchangeable.
Step 3: Click the link, select your model. In order to make sure that iOS 10.2 is still signed, open the page https://api.ineal.me/tss/status and scroll down to your device. If the site States that the system is not signed, then you can not continue, otherwise you’ll have to install iOS 10.2.1 or higher.
Step 4: connect the device to computer and start iTunes. If the program prompts you to upgrade the software, click “do Not ask again” and then “Cancel”.
Step 5: On the devices page in iTunes, locate the two buttons “Update” and “Restore”.
Step 6: Select the option you want. It is recommended to choose recovery, as in this case, all data is deleted and it will be a “clean” install that will prevent future problems. The update function saves all the data, but can cause problems in the future.
Step 7: Hold down the Option key on Mac or Shift on Windows and click “Update” or “Restore”. Otherwise iTunes just install iOS 10.2 or 10.2.1 without your knowledge.
Step 8: once you have selected using the Option or Shift will appear a file browser window, prompting you to specify the path to the downloaded IPSW-file.
Step 9: iTunes will ask to confirm the choice. At this stage, make sure you set it iOS 10.2.
Step 10: Begin the process of recovery. Do not disconnect the device from computer, until it finally will not boot.
Step 11: If you have upgraded from an earlier iOS version and clicked “Restore” instead of “Update”, you can restore a backup from iTunes, but it is recommended to configure the device as a new device.