I'm sorry to hear of your concern
First of all, it is not illegal to prank someone over the phone. Secondly, you allowed the use of your phone---nothing more. That will not provide for any liability either.
I'm wracking my brain trying to think of a scenario that might involve a prank that was illegal and I just can't think of one---much less that by simply allowing some=one to use your phone, you somehow become liable for a practical joke.
if you want to share the nature of the prank with me I'll take a look at it, but from a criminal
law standpoint I just don't see a telephone prank creating any criminal liability short of you being subject to a protective order in which you had been ordered by the court
not to have any contact whatsoever with your ex---and you convinces this friend to screw with his head. So no, I just don't see any kind of an issue here for you.
You may reply back to me using the Reply to Expert
link if you have additional questions; and if you do, I ask that you please keep in mind that I do not know what you may already know or with what you need help, unless you tell me.Kindly take a moment to rate my service to you based on the understanding of the law I provided.
Please understand that I have no control over the how the law impacts your particular situation, and I trust you agree that it would be unfair for me to be punished by a (negative rating) ----the first 2 stars/faces----for having been honest with you about the law.
I wish you the best in 2012,