iPhone doesn't support QC 3.0 right, so it should be using the standard 2.4A charging?

ipad charger still works great on charging iphone... ipad charger 30mins 0-72%... type -c PD fast charge 30 min 0-79%..

From GSMArena's review of the XS Max: -

"We can all agree it's a bummer that Apple isn't shipping its most expensive smartphones with a fast charger, but there is one very good explanation why. It's simple - Apple doesn't want you to fast charge your iPhone.

Unlike Oppo, Apple doesn't have VOOC-like tech and relies on the regular USB-C Power Delivery chargers bundled with the latest MacBooks. Using such chargers will likely shorten the battery's overall lifespan."

So slow-charging is basically Apple forcing us to accept how best to manage the battery lifespan.

It's Apple

double tapping the screen will screen on the phone as well

Full set Baseus. Glitter case, Arc Surface TG and Camera TG for IPhone Xs Max.

ohh ok. i already remove the beta profile. BUt how to revert back to ios11? then means i need to reinstall all the apps myself? currently i am on ios 12.1 beta, so downgrade to stable ios12 how to do?

12.1 is beta. You won't get it unless you revert to beta.

It's a beta la bro, no need sifu to explain, hehe...

By the way, yours got "charge gate" issue?

This fella just want to troll me. 

Oh ok. Hopefully 12.1 will fix that too.
Now you are really trolling

https://www.imore.com/how-download-ios-public-beta

You'll need to register first, of course.

if you're looking to upgrade your phone next year, then resale value could be something you want to consider too..

Yes. If your phones drops onto the floor and breaks into half. 

What you wanna do with 2m bro? Tie somebody up?

2m.. wont regret..

The longer the cable, the slower it charges.