Since i don't use EDGE very often, i only apply the correct settings when i need it.

Eg: for Maxis, the APN is unet. I usually set it to 'une' when i don't use it. When it need it, i just set it back to 'unet'.

Probably it is a bit troublesome, but i don't use it often so it's fine with me. Plus, i would rather spend 30 seconds applying the settings than wasting 30 ringgits.