Originally Posted by
MadduckUK
if you can, you want to update it to 2.73.405.66 ROM and 63.18.55.06JU_6.35.09.26 radio, preferably after rooting (or you may need to root it anyway if you are on a t-mobile, orange etc branded handset)
after that you want to put a task killing app on, i use taskpanel lite but there are plenty in the market to choose from. you can use this to kill off selected memory hogging applications like the browser when your phone goes into standby.
no lag at all, and iv got a shedload more stuff on than you so id give this a bash