Newbie here with help please

[Magnumpower]

Hey guys, newbie here.

I have the pro2 from Sprint. had it for a while. Lately, it's been annoying the hell out of me. Very slow, TF3D takes forever to open texts. when scrolling and I stop on texts, it takes about 10 seconds to show the last text. Then when I click it (instead of pressing all messages) it takes about 35 seconds to open so I can reply. Not really quick haha

I get the pin wheel often, and am having to press the reset button when it freezes. I had the ASU2? or something like that installed, (kind of looks like the iphone) but deleted that and the rest of my programs too.

I've read about unlocking the phone so I can run different things that are more efficient, but don't really know what to do.

Can you guys help me out (in a dumbed-down way LOL) and give me break down of everything I need to do?