Most BGMI settings guides list every option and tell you to lower all of them. That is not useful, because three settings do almost all the work and the rest cost you visual clarity for frames you were never going to lose. Here is the order that matters.

The short version

Graphics quality: Smooth
Frame rate: the highest your phone can hold steadily, not the highest offered
Anti-aliasing: off
Shadows: off
Everything else: leave it alone

Graphics quality is the one that counts

Graphics quality controls texture resolution and effect detail, and it is by a wide margin the heaviest setting in the game. Dropping from HDR to Smooth frees GPU work and memory bandwidth at the same time.

Smooth looks worse. It also makes enemies easier to see, because there is less visual noise between you and them, which is why most competitive players use it regardless of their hardware.

Frame rate: pick what you can hold

This is where most guides give bad advice. Setting 90 FPS on a phone that can only sustain 55 does not give you 90. It gives you a frame rate that swings between 50 and 75, and inconsistent frame timing feels considerably worse than a lower steady number.

Set the highest option, play one full match, and watch whether the number holds. If it drops and stays down after ten minutes, that is thermal throttling and you should step down one level. A locked 60 beats a ragged 90 every time.

Setting	Frame cost	Worth changing?
Graphics quality	Very high	Yes, set to Smooth first
Frame rate cap	High	Yes, match it to what your phone holds
Anti-aliasing	Moderate	Yes, turn it off
Shadows	Moderate	Yes, turn them off
Style / colour preset	None	No, purely cosmetic
Brightness	None on frames	No, but it affects heat via the screen

Anti-aliasing and shadows

Anti-aliasing smooths jagged edges and costs real GPU time for a benefit you will not notice at arm's length on a phone screen. Shadows are similar: they add depth, cost frames, and occasionally hide things you would rather see. Both off.

What does not help

Changing the colour style, adjusting brightness, or switching between control layouts has no effect on frame rate. Neither does any third-party configuration file promising to unlock hidden settings. Those files typically edit values the game validates at launch, so at best nothing happens and at worst you get flagged.

Be careful with "90 FPS unlock" config packs aimed at low-end phones. If your device does not expose the option, it is because the hardware cannot drive it. Forcing the value does not create performance, and modified files are a ban risk.

Outside the game

Two things outside BGMI matter more than most in-game settings. Close background apps before a ranked match, which helps most on phones with 4 GB of RAM or less. And take your case off, because heat is what turns a good first ten minutes into a bad last twenty.

If lag persists after all of this and your frame rate is steady, the problem is not graphics at all. See what ping is and how to lower it.