iPhone Upgrading iPhone 4 to 6.1.2

[citivolus]

A friend of mine gave me his old iPhone 4. It's currently running iOS 5. How can I upgrade to 6.1.2 without being forced to upgrade to iOS 7?

 

[aPple nErd]

You cant unless you have ios 6 shsh blobs. Otherwise its either 5, or 7. I recommend staying on 5 since it is a very stable
Release on iphone 4.

 

[citivolus]

Is there any way I can JB now on ios5 and use those blobs to upgrade to ios6?

 

[Applejuiced]

No.
You can either stay where you are or go up to the latest 7.1.2

 

[citivolus]

I also have a second iPhone 4 on Verizon (original one is on AT&T) that is on 6.1. Is there any way I can use that one to generate an SHSH blob under 6.1, then modify it to be used to upgrade the AT&T iPhone to 6.1?

 

[wannabepcuser]

You can't. The blobs are device specific.

Research a tethered jailbreak. You may be able to do what you are looking to do. There are a number of negatives though.

 

[darricksailo]

I also have a second iPhone 4 on Verizon (original one is on AT&T) that is on 6.1. Is there any way I can use that one to generate an SHSH blob under 6.1, then modify it to be used to upgrade the AT&T iPhone to 6.1?

you can make a blob for that iphone for 6.1

but since each shsh blob is specific to each device, you can't use it for another device

 

[Applejuiced]

No.
Before you ask any more questions about downgrading research and learn what shsh blobs do and how they work to get a better understanding.