I was downloading some ham radio apps onto my phone. I saw some PSK 31 apps and downloaded a couple if for no other reason , then because I just like the way the mode sounds. Being a Technician, and poor, my HF and SSB options are limited at the moment. So I began to wonder if anyone has used PSK31 in FM on 2M or 70cm and ran a quick Google search. From this search I gathered 2 things: 1: A lot of people have had the same question I have. 2: A lot of people are against the idea, and for some good reasons. BUT It seems to me there is a good reason for this mode over FM, and that reason: Acoustic Coupling. I can just hold my radio and my phone up against one another and it works great. No extra wires or TNC to fiddle with, no extra money to spend. I've tried this with Packet and it sucks. The data always comes in damaged even under full quieting. So my question: is there a FM data mode better suited to acoustic coupling. Maybe I'm missing something for someone in my situation but it also seems to me that this would appeal to younger hams as well. Idk what do you think about it?