Found this link that allows you to receive a personalised call from Prime.

However this only works for the US but on the other hand, you're still able to hear a preview of the call (and if youre a total nerd like me, record it)

Nonetheless, its awesome and worth a shot

Here's the link:
http://www.transformersmovie.com/protect/

for the decepticons version i think its:
http://www.transformersmovie.com/destroy/