I have a Samsung Exhibit II 4G (2.3.5) and need a new phone. The ExII is just too slow and irritating. My wife has a Sony Xperia T (4.3) and I am not so pleased with it either.
My big complaint is the instability caused by memory filling with apps that I/we don't use. I don't use a phone for social media or movies and do very little texting. I do write my own apps with Eclipse that make it a worker for my engineering work so do want a smart phone. I have tried a few root ROMs on the ExII but it always becomes unstable and will lock up or refuse to boot at the worst times.
I am looking for models that users either have rooted and are stable or didn't need to be rooted to keep them running fast.
I prefer smaller screens (4-4.5") and less than $300 but will go outside those bounds if I gain stability.
Any suggestion are appreciated.