How to increase ghz on android phone?

As someone who's bricked a phone trying this I strongly advise against it. The performance gains are minimal (maybe 5-10% in synthetic benchmarks) for a huge cost in battery life heat and risk. Modern phones use dynamic clocking—they boost to high GHz for short bursts when needed (like opening an app) and then throttle down. Forcing them to stay high just makes them thermal throttle faster actually reducing sustained performance.

If your phone feels slow try these safe steps first: 1) Enable "Developer Options" and reduce animation scales to 0.5x. 2) Clear app caches. 3) Uninstall unused apps. 4) Perform a factory reset (backup first!). 5) Check if your manufacturer has a "performance mode" in settings. Overclocking a sealed device with passive cooling is a recipe for a dead phone. It's not like a desktop PC with a giant heatsink.

You're asking about increasing the clock speed (GHz) of your Android phone's processor. This is essentially overclocking. Warning: This is generally not recommended for most users. It can void your warranty cause system instability lead to overheating and permanently damage your device. Phone processors are already optimized for a balance of performance and battery life/heat.

That said if you have a rooted phone and know the risks the process involves: 1) Rooting your phone (unlocking admin access) which itself is risky and voids warranty. 2) Installing a custom kernel or a kernel management app like Kernel Adiutor or Franco Kernel Manager. 3) Within the app you can adjust the CPU governor and increase the maximum frequency (GHz) sliders for the big and little CPU cores. You must also often increase voltage slightly to maintain stability which increases heat. 4) You need a robust cooling solution (like a Peltier cooler) to manage the extra heat. This is mostly done by advanced enthusiasts on specific phone models with developer communities (like older Pixel or OnePlus devices). For 99% of people a better way to improve performance is to free up RAM disable bloatware use a lighter launcher and keep your phone cool. XDA Developers forum is the hub for such advanced modifications.