How to reset Samsung S5830 Galaxy ACE phone
+ 
Press and hold HOME + POWER/LOCK buttons together.
OR
To hard reset your Samsung S5830 Galaxy ACE phone:
press *2767*3855#
Samsung Galaxy Ace S5830 hard reset key combo
Warning! All your data will be lost! Back UP everything first. + Press and hold HOME + POWER/LOCK buttons together.
OR
To hard reset your Samsung S5830 Galaxy ACE phone:
press *2767*3855#