Antenna works on other phones
want the phone to have optimal signal strength for incoming call notifications
are sick of partially retracting the antenna in the middle of a call due to running it into the brim of your hat
then be informed that the i325 antenna seems to work very well on other models. I would imagine that the i305 and i315, at least, would be able to use it well.
I am using it on an i605 (!!) with no trouble so far and seemingly great signal strength.