Highest bitrate for movies on the iphone 3g

[mike11]

I have been using ojosoft iphone video converter for some time to convert mkv high def videos to the iphone format.
Now the highest bitrate is 2500 you cant go over that by using ojosoft mkv converter which offeres much much higher bitrates, because it wont transfer the converted file to the iphone 3g via itunes.

Has anyone been able to transfer higher bitrates?

I wondered, if an iphone 3g is jailbroken then can higher bitrates be transfered by use of other transfering programs like itunes does.

Anyone tried it? or can try it.

Thanks