iphone xs max 256

pls guys I need to know if my iPhone battery is genuine I hit this xs max on the used market with 97 health only to get home charge and realize the battery showing service I called the seller he said it’s not bad I asked if the phone battery was changed he said no that it came that way not yet...

I'm thinking to upgrade my 6-year-old iPhone 6S Plus to a new iPhone, either iPhone 11 or iPhone Xs Max. But not sure which one to buy? Obviously iPhone 11 is the latest one with the newest system, but iPhone Xs Max was last year's flagship iPhone and now it's much cheaper.

I've had the iPhone XS Max 256GB since launch. The volume was excellent, nice a loud easily heard. I have all volume controls set to maximum in settings, and in the control Panel, and in Siri. However, after months of use the sound has become noticeably lower. Its now to the point when Im in...