When trying to update my Samsung Galaxy Ace, I found it difficult to get into Recovery mode, as many online tutorials point that you need to press the power button, volume up and start at once, but this leaves us in the mode RAMDUMP Mode (ARM9 Mode).
Recovery Mode on Samsung Galaxy Ace S5830
1) To enter recovery mode, the first step is to turn off the Samsung Galaxy Ace S5830
2) Then, with the device off, we must press the power button and home at the same time for a few seconds.
3) To move between the options of recovery, we can use the up and down volume and startup buttons to select.