I’m pretty sure the case isn’t glued together, it’s ultrasonicly welded together! Meaning, the two outer parts of the plastic casing are melted and joined together into one piece. That is why it will never separate perfectly as one would want it to.

What is the error that you are seeing on your iPhone/iTunes? That would better help us to determine what your next steps are to be taken!

brimest0ne, the inner ring is fastened down by the same three screws originally removed in step three! When you remove the inner ring, the bass volume adjustment side will give you a little resistance, just be gentle and it comes right off. That’s it, now replace the battery and start using the headset again! What I really want to know, has anyone done an upgrade will battery replacement and how much more time are you getting from the upgrade?

Try this site, if you haven't found one yet!

https://ipsw.me

So, I'm assuming you are doing this to correct a connection problem between the Sega CD and Genesis. Now that it's disassembled are you slightly bending the connections for a better fit, or cleaning the connectors to remove over 20 years of tarnish build up, or replacing all together with a new manufactured unit? By the way, I have my Sega CD and Genesis still to this day. They are in their original box with all the manuals and other pamphlets that they came with. I should see if Sherlock Holmes is still boring as it was when I first played it back in '91. Better yet play Night Trap and think about how controversial this game was at the time and even was pulled from store shelves, because of the controversy surrounding the girls outfits worn in the game.