The new back cover, which is 25€, and does very little except maybe it’s less likely to crack if you drop the phone, but it doesn’t protect the phone and the price is crazy. The case at 35€ is also unexpectedly high. Each is just a dumb piece of plastic.
There are also a few views that the camera upgrade isn’t very good, so you may have the best idea.
Hope all goes well. You may still be interested in: