how do you restore your blackberry pearl to its factory settings?

when i put games on my blackberry does it make the device go slower? and how many games wouldn't be a problem?

as soon as you get like 2, i have four phones sony ericsson m600i, blackberry pearl, nokia 7373 and another sony ericsson 790i and the blackberry is the worst i think people just like these for looks bc the whole phone itself sucks its slow and cuts out the pixels are garbage and the trackball is the dumbest thing on a phone beisdes pointless buttons. sell your pearl and if you want a gaming phone go for sony there the best for that and camera phones nokia is good for display and product quality pearl, good for wasting time ... that youll never get back

umm i cant type blackberry at the end because i type blac but instead of a k a j comes up i cant change it dumb phone help!!

send me secrot core for blackberry 8100 factory setting