Please sir, my Iphone XS battery drains quickly and my phone overheats and also has lagging problem, please give the solution.
Battery and over heating
These are the Developer Forums, where developers of apps for Apple's platforms ask each other for hints and tips on coding. These forums are NOT where Apple's actual developers chat about stuff.
Your question is more of a product support one, so I'd suggest you ask it over at the Apple Support Forums. Thanks.