Hi Apruv,
Downgrading the firmware may brick your device and there is no official tool to downgrade from the current firmware.
If your facing slow issues you may try the following steps below :
1. boost the memory when you see memory consumes is high with no app running,
2. restart the device,
3. check for background running applications, stop/disable unwanted apps,
4. check for latest ZenUI/3rd party Apps update.
ZenFone memory management |