> Lenny Troll runs best on The Raspberry Pi with a USRobotics USR5637 Voice Modem connected to your home telephone

I'd love for Lenny to somehow run on my mobile phone - I get plenty of spam calls there that I'd love to tie up with Lenny for awhile, but I have never been able to get it to work.

Your best hope there is finding a way to transfer the call or do a three way call. I don't think either appstore wants to let developers interact with PTSN calls.