what u install lar? seems like lagging.... what iphone u using? what iOS u using now? it should give some basic idea at least to define ur nature of the problem

lol... sorry i didnt notice its iphone 4 TS....

just trying to make sure its not software problem 1st... because i know most of my friends using iphone n never clear their apps (double click the home button then u can see the apps that still running) because most of them complaining about their iphone lagging.... so ends up they didnt properly shut all the apps they're using...

if u sure its not the software problem then i guess its time to send for warranty loh...