QUOTE(thiri56 @ Aug 15 2011, 04:11 PM)
yes they installed d same software...if hardware wat could it be?? can i demand fr a new phone?? what are d chances of getting a new phone with samsung?? ... do urll have d like 2 seconds lag with stock rom when exiting any applications??
This maybe quite an hassle for your but you can try it first before you bring your phone back to service centre again.
1) transfer all your pictures, video and songs to your external sd card.
2) unmount / take out your sd card from yout phone.
3) Do a hard / factory rest to wipe all you data (you will lost all you apps)
4) Start your phone and try if you lag prioblems solve (dont put any app yet)
5) If still laging then bring it back to service centre.
6) If no lagging, then try download each app one at the time. Try your phone after installing each app. ( This way you can monitor which app is slowing your phone )
7) If still no lagging, only then you mount your sd card and try your phone again.
8) If only now your phone start to lag, that's mean either your pictures or video or songs inside ypur sd is corrupted or your sd itself id corrupted. It got nothing wrong with your phone. :-)