first root ur phone
How to root Galaxy Ace s5830i.
1.Put update.zip in your main directory in the SD card.
2.Turn off your phone.
3.Boot in Recovery by pressing:POWER+VOLUME UP+HOME buttons.
4.In Recovery select Install zip from sd
5.Choose update.zip
6.Reboot your phone and it's ready.There must be a Superuser icon in your Apps menu.
if u like my post press only thanks
http://www.4shared.com/zip/foYiB2NW/update.html?