I had the iPhone 6s Plus, so I returned to step 26 here:
iPhone 6s Plusのバッテリーの交換
It would be nice, though, to have all the links at the top of the page down here as well.
Thanks for the tip, joetalaga!
Wow, reading the comments I was really worried about this step. But I must have gotten a good batch, because the blue backing came right off and this step was no problem at all.
When I did this, the 5 inch strip stretched to about 3 feet.
I used a hair dryer to warm the back of the phone, and I still broke two of the three “taffy stickers”. If I did it again, I would keep the back warm with a hair dryer, and gradually pull one piece straight out at a time at as low an angle as possible. Unfortunately, the small backers came off my perimeter adhesive, so as I pulled the taffy stickers out, it stuck to the perimeter adhesive and messed it up. Perhaps remove the battery before applying the new adhesive around the edge of the phone? Everything was going well for me until this step.
Press hard. Some of the adhesive came off the phone as I was peeling the backing away in the step 11. You want to make sure it stuck on the phone so it doesn’t stay attached to the backing.
The release liners either stuck to the main backing as I pulled it off, or it pulled the adhesive itself away from the phone! Be very careful, or you’ll have a sticky mess trying to get the adhesive back in place.
Props to Dwayn Draper for his above comment above. I see no way to do this step without either pressing the battery connector down (which would energize the logic board and perhaps be bad), or cutting a hole in the adhesive backing to accommodate the battery connector while it sticks up. I laid the whole blue thing over the phone and used a sharpie to mark where the connector stuck up. Then I used a sharp pair of scissors to cut out the marked part of the backing. This allowed the adhesive to line up nicely around the edges of the phone.
The three pictures show him peeling the adhesive backing away as he lays the adhisive in the phone. I found it easier to peel the whole backing away and then very carefully align the whole adhesive before gently pressing any of it in place. This way, you can be sure it will line up perfectly and avoid having to redo it.
I used an Isopropyl alcohol patch from a first aid kit.