Motorola V500 / V525 / V505
BLUETOOTH!!!!!
let me try and help you, firstly go into your phone setup (as you suggested in your post) and go to connections and then click on blue-tooth (you did not say what phone it is but i am sure they are similar) go to setup and then click on find me or enable discovery mode (which will put your phone into discovery mode for sixty seconds, you can also enable the phone to look for devices and it will scan the area you are in and i am am correct the area between two blue-tooth enabled phones or dongles is ten meters (thirty three feet) and it should come up with your brothers' phone and then it will try to access the phones device name and then you will have to provide a password key to access your brother's phone and if you put this co...
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Multimedia > Sounds > Highlite a ringtone > Press the menu button > scroll down to copy > Highlite the code name for the other bluetooth device > then it's send or ok, I forgot which.
I couldn't find out how to do the above in the manual, I just had to figure it out by trial and error.
Good Luck,
Len