So, it was relatively easy to follow the process?
Was there any usability difference between the standard ROM and the custom ROM?
Speed difference?
Battery life difference?
Just intrigued on how to make the phone do more, even though I don't actually use it that much.
For the Galaxy S2, yes it was easy to follow the process. It was using software called Odin to flash the file provided to root the device, then you put the custom ROM you download onto your phone, boot the phone into recovery mode (holding up volume button home button and power button together) and you find the file in there, select it, flash it and you're all done.
It totally depends on the ROM. Mine has no extra functionality because I wanted it to be as stock as possible.
Apparently there was a few speed tweaks here and there but the S2 is so fast anyways I probably didn't notice. On smaller less powerful phones like the Wildfire (which is riddled with bugs and lag issues) it should make a considerable difference.
Battery life, again depends on the ROM. You're never going to see a big improvement. One of the main issues of Android is that it doesn't make it clear that in the end the biggest difference you can make with your battery is how you use your phone: how many apps you leave open, leaving GPS on, screen on high brightness, etc, will all drain battery. You can download battery monitors and app killers from the store to help you out.
It all depends on the ROM you download to add (or take away) what functionality you want your phone to have. It just involves a bit of research into what you want.
Okay thanks GT. I found a rom on xda which I saved on my laptop but don't remember the name off hand. For it all you had to do was use the ROM manager app and just make sure that when you flash it you choose to wipe the phone which seems pretty simple.
The reviews on it were very good and they all said increased battery life and smoother performance. I use my phone a lot so those are pretty nice improvements. I also have a lot of lag issues and my phone doesn't ever switch to known wifi networks when I walk into them and with my data cap at only 500 mb that has become an issue now and then. Oh and GPS is fixed with that rom which would be awesome because right now mine is useless.
That all sounds good to me. Just make sure before you wipe the phone to back up anything important from it, like contacts, messages or anything that maybe an inconvenience to add back into the phone.
If there are any other backups they recommend you do, DO them. It will give you an option to revert back to your previous phone state if your phone doesn't boot or function properly after the ROM is flashed - in the very small case that could happen.