Maringal wrote:
He said two things that are false. Frankly, I don't like spending time on things that aren't on point. But, here you go, my phone screen has already had one repair and the touch ID works just fine. And, he said "your phone becomes completely unsupportable here and by Apple". Apple support staff help me on the phone and in the stores with my phones that have been repaired elsewhere.
There are some who use a certain amount of hyperbole using terms like "unsupportable". Software support clearly doesn't end simply because a device has been through "unauthorized repair". I've had Apple devices that went through third party fixes and Apple didn't trigger some kill switch because there was a third party battery or a third party screen repair, and it would be easy for Apple to do so in iOS. In fact there's a good chance that one could take such a device into an Apple Store and ask for help regarding a software or other issues.
However, once there's been third party repair, Apple may disavow any hardware repair services, although I have heard of Apple replacing a screen or even replacing a battery despite clear third party repairs. However, that seems to be taken on a case by case basis.
The issue with Touch ID is that sometimes when third party screens are installed (with the home button switched to the new screen), it can be disconnected from the processors, and thus "unpaired". Once that happens, the only means to restore would be through Apple's "Horizon Machine". Apple's general fix for a bad home button is to replace the entire screen assembly, which will include a new home button. Aftermarket screen replacements don't typically have a home button. Aftermarket home buttons won't have Touch ID functionality. The only hope in that case to keep Touch ID functionality is to transfer over the original home button and hope that it still works.
It would be up to you whether it's worth repairing it. Obviously with a third party battery you'll have the issue that Apple's official battery health reading won't work and you'll see an annoying warning. There's a chance that the home button loses contact with the processors and Touch ID is lost. However, if you feel it's worth $120 and you trust the repair shop then I don't see why not.