Can i downgrade from 12.4 to 12.2 with shsh blobs?

[RDmvv]

Well i have my blobs saved but i don't know how to downgrade from 12.4 to ios 12.2, i have an iphone 6.

[Chr0nicT]

You would need to set a nonce. Which would need a jailbreak. And an exploit for such has not been publicly released.

So: No.

[GeoSn0w]

As Chr0nicT said, you need a Nonce Setter which is based on a tfp0 exploit because it has to unlock the NVRAM before it can set the generator. You'll need to wait for such exploit.

I will close the thread now as there's not much else that can be done.