Maybe it's because it was my first time, but everything was so much more complicated... :D

Step 3: "The screen should become separated using little force"? LOL! I'd rather say: "Some kind of epic struggle". Maybe it's because I'm a novice, but the whole %#*@ thing simply didn't want to come apart.

Step 4 & Step 5: Totally unnecessary: you can easily remove the old battery and insert the fresh one working around the ribbon cable. And removing the metal clip is pretty difficult, so just leave it be.

Step 8: Here it's where the REAL swearing began. No fancy "copper strip", just some sort of very thin black tape, totally impossible to lift up and then put in place again. I had to scrape away the %#*@ thing to access the battery connector, and obviously I couldn't put it in place again. I guess someone decided to change the production process, probably to cut costs (the black tape probably being much less expensive than the "copper strip")... Anyway, the phone now works like a charm...