The emulator to do this is called Vampent VbagX 1.25. It works on mobile phones running the Symbian OS. Here is the website.
www.vampent.com/vbag.htm
You can assign different keys on your mobile as the keys of the gameboy console. You can rotate the display and change the size of the display. You can also change the volume at any time. The best part is that you do not need to save any game from in-game save menus. Because Vbag can save and load a game any time. There are 5 save slots per game. Okay here are the steps.
1. Go to the above site and download VbagX 1.25 according to your symbian version.
2. Now put it in your phone and install it on YOUR MEMORY CARD.
3. Now download some games. They have the file extension "game.gba". They are usually called gameboy advance roms. So after you download them put them in the following folder in your phone.
E:\data\others\vbag\"put-roms-here" (E:\ stands for your memory card)
4. Now open vbag in your phone and open a game.
At first its quite hard to get used to playing in vbag but once you play a little it gets easier. press the right Soft key to get to the vbag menu any time. You can save or load a game from there.
Note about saving and loading a game - Say you have more than 1 gba game on your phone. Saving a game has no problem but when you need to load a game you have to first open the respective game in vbag. Then, from the vbag menu you can load the saved game.
Games I have played using Vbag.
1. Sims bustin out.
2. Sims 2 - There is a sound problem.
3. Avatar the last air bender.
4. Golden Sun
5. Baldurs Gate - sound problem.
6. Broken sword.
If you have any problem playing a GBA game on vbag post here and I'll try to help you.














