• Look for a controller with a cooler already in it(prefrebly with a peltier module) and also analog stick because that migth be better than this, something like D10S.
• If you can live without analog triggers(racing games) then you should consider JK-02 which comes with a peltier cooler and shoudl help with high temperatures.
• If your phone has "Game Mode" kind of thing, it can ruin the mapping randomly, happened on the Iqoo phone I have so disable them.
• Many games such as BGMI ban the use of such controllers like this which have the optoin of emulating quick triggers. It can get you banned in those games.
• Vibration doesn't work at all on Android via bluetooth mode.
  XBOX Mode and Switch Mode the vibration doesn't work. It works in Android mode so you will need to play games that don't have gamepad support to get vibration.
• Clamping force is very very strong when it's pulled to the size of the gamepad and thinking you can just put in a right angle USB c adaptor will let you play games with vibration is simpley incrrect.

Manually measured with a scale:
    Maximum Phone Length: 18cm or 7in.
    Maximum Phone Depth: 1.25cm or 0.5in (It can of course fit a bit more thicker but that's how much the rubbers go upto)
    Maximum Phone Width: 8.2cm or 3.25" (But no limit on the top so you can fit any size even a tablet although the stability needs to be checked)→ Never mind, tablet became too top heavy, unusable as you can't push the tablet to the middle due to a stopper at bottom.

  

Pros
• Analog triggers and very sensitive too, works great in Colin Rally PS2 games. This was the main reason to consider this controller.
• Works as Nintendo Pro Controller, XBOX Controller and Android Controller that can use mapping.
• Dedicated app to adjust trigger and sticks thresholds and even bind with screen controls if the game doesn't support native gamepad.
• Quite comfortable joysticks.
• Wired mode also in the controller for low latency gamign however you will need a type-c to type-c right angledcharger that's pretty strong as the clamping foorce is too high on this.

Neutral: Bad
• RGB can't fully be turned off. The Mode and RGB buttons always light up.
• Back Macro buttons can only be bound to controls already on the controller, nothign extra.
• Lower chin although might help with security so that the phone doesn't fall down, it ruins the use of a bigger tablet with it for some 3DS or DS games that needs that vertical orientation.
• The minimum width is too little to play games in vertical mode(3DS/NDS)

Cons:
• Vibration is not working on Android. It works on PC but for some reason just doesn't work on Android. Check video below.
• Bulky and heavy controller. Good for ergonomics but bad for portability and I never wanted to take it out with me because it's so big.
  Note: I always pick up R36S on my way out and never want to take this with me.
• No charging port.
• No space in back just for passive heat dissipation.