Hi,
I am using Samsung Galaxy Ace GTS5830i for thepast 1.5 yrs, overall I am not unhappy but few more improvements are required.
Cons:
Android software upgradation is not available.
Low internal and RAM memory.
Battery back up is not great.
Since older version of android present many apps are not supportable.
Mobile keeps hanging frequently.
Zoom option is not available in camera.
Pros:
Nice smartphone for low budget.
Camera clarity is good.
Good Flash