Hi guys i upgraded my orange stock firmware to Sweedish Spring RLS5 a while back and since doing so its made my phone at times slightly sluggish on the menus and some games my question to you guys is there a better rom to go to instead and is it easy to switch between roms?

also i have an o2 pay and go sim and since i have had this rom i cant send or recieve picture messages any idea

what would you reccomend please help