So... your older mobile phones had an opinion to remove the backplate to remove the battery. In new ones you can't do that. It's one piece, the only thing you can open is the memory card/SIM card deck (which is difficult to open anyway, but at least it's something). Why did you stop adding that option to modern devices? What made you think that's a good idea to not be able to remove the battery?
It does! It really does! Take it from me. I'm not going to tell you to dunk your phone in water, but the ip ratings really do work. Look up rating tests on YouTube!
Yeah I fix phones a lot. For a while now, it's not easy to open the newer phones. You need a heat gun and mini tools. Adhesive to put it back together. There is a lot of tear down and it is very sensitive. Small cables to keep track of and make sure they're plugged in. It's doable, but not easily if you aren't proficient in electronics
