Try factory resetting first.
If you are still unsatisfied with the performance with your device, i think KIES and ODIN can be used to flash an older firmware.
HTC Incredible S S710e (Eventually stopped turning on)
Nexus 7 2012 (Half the screen stopped responding to touch after leaving it for 2 months, also has weird marks on bezel, no idea from where)
Sony Xperia Z C6603 (Passed it down to family member, I actually hated this device)
Samsung Galaxy S5 SM-G900I