[meem]

I tried agin to remove every hacks and Jailbreaks, It done successflly,
Then I tried to update again,

I got this status message at the right bottom corner of screen while updating:

stage 1 of 3

Then:

stage 2 of 3

Then:

stage 3 of 3

And the device has been updated successflly after restarted.
Now I have v2.5.4.