Help/Support Not able to sync iPhone 6S with iTunes?

[._. 1.9k 9 9.3.4]

iPhone type: iPhone 6S

iOS: 10.2.1

Jailbroken?: No. (That's what I'm trying to do :p)

 

Hey guys!

So, I'm trying to downgrade my iPhone 6S from iOS 10.2.1 to iOS 9.3.3 so I can jailbreak my phone. I followed a youtube tutorial (and checked another, and they were doing the same process), and downloaded the IPSW file for my iPhone 6S for iOS 9.3.3. I followed the steps (backing it up, opening iTunes, connecting to PC via USB cable), however when it went to sync, it gave me numerous errors, such as error -54 (https://support.apple.com/en-us/HT205597) and "This iPhone "NAME" cannot be synced. A duplicate file name was specified" (https://discussions.apple.com/thread/2520158?start=15&tstart=0). As you can see from the links in the brackets, I tried doing my research to try and solve these issues myself. For the error -54, the first solution was to just ignore it, so I thought, hm, let's try to ignore it. The duplicate file error was a little more pesky however, because when I tried following the steps, I got to around step 5 on jerrodsdad's response, however after I right clicked the iPhone and clicked properties, there was no "tools" button to press. I'm honestly super confused right now, so any help would be greatly appreciated!

 

Thanks.

[its.me.you 166 9 10.1.1]

What tutorial are you using? I'm pretty sure there's no way to downgrade from iOS 10.2.1 to iOS 9.3.3 with out blobs or by or by future restore 

[Sneezh 1.1k iPhone 14 Pro Max 16.4.1]

You can't downgrade like that, because iOS 10.2 is no longer being signed.

The only way to do it is if you have shsh blobs saved. (Which you obviously don't)

[._. 1.9k 9 9.3.4]

5 hours ago, Sneezh said:

You can't downgrade like that, because iOS 10.2 is no longer being signed.

The only way to do it is if you have shsh blobs saved. (Which you obviously don't)

 

10 hours ago, its.me.you said:

What tutorial are you using? I'm pretty sure there's no way to downgrade from iOS 10.2.1 to iOS 9.3.3 with out blobs or by or by future restore 

If I updated to 10.3.1, could I do it?

[KFCzZz 10.4k iPad Air 10.3.3]

4 minutes ago, ._. said:

 

If I updated to 10.3.1, could I do it?

If you save your blobs

And the iOS you're trying to go to is not being signed anymore so you can't 

But I've heard that there will be a jailbreak for iOS 10.3.1 in a week or so