How to Upgrade from iOS 8 to 10.2 with Prometheus

Still stuck on the aging iOS 8? Well, it’s time to update to iOS 10.2 now and jailbreak it. Here’s how to do it.

We will be using Tihmstar’s Prometheus utility to perform the upgrade. Before you begin the upgrade process, you must first enable tfp0 patch on Pangu8 jailbreak.

You must upgrade quickly before Apple stops signing iOS 10.3.1. This will ensure your TouchID remains intact because iOS 10.3.1 SEP is compatible with iOS 10.2.

ios firmware

Just like all other tools, Prometheus requires valid SHSH blobs. This tutorial will be useless if you don’t have valid SHSH blobs.

SHSH blobs are what allow you to upgrade or downgrade to unsigned firmware versions.

Now onto the tutorial. Keep the following things ready beforehand.


  • A jailbroken iPhone, iPad or iPod running iOS 8
  • A computer running Windows/Mac/Linux
  • A USB cable
  • iFile/Filza file manager
  • SHSH blobs for your destination firmware

How to Upgrade from iOS 8 to 10.2 with Prometheus

Step 1 Download Suarik’s tfp0 patch from here.

Step 2 Install this debian package with iFile/Filza file manager.

Step 3 Download nvrampatcher tool from here.

Step 4 Now you need to SSH into your iOS device. To do this, simply launch Terminal and enter the following command –

ssh root@[IP Address of your device]

Remember, the default root password is always “alpine”. 

Step 5 Open another instance of Terminal and type in the following command –

scp nvrampatcher root@[IP Address of your device]:

Step 6 Now go back to the Terminal window you opened in Step 4. Enter the following command –


Step 7 Follow this in-depth tutorial on how to use Prometheus utility and perform all the necessary steps –

Step 8 Now that you are on iOS 10.2, download Yalu jailbreak IPA file.

Step 9 Follow this jailbreak tutorial to use yalu102 jailbreak.

That’s all there’s to it. Your device will now be successfully upgraded to iOS 10.2. Enjoy your new jailbreak!

If you are getting any errors or issues, please leave a comment below. I will be happy to help.

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