Ummm, curious... I would think Carrier based threads would be less about "software" "hardware" and more about the carrier support of the device and OTA troubles with the carrier, but I'm sure there's lots of ways of looking at it... As far as the dilute of conversions, I can see your point there, seems to me like that's more about a wish the forum software would just put a "category" option on posts and then for the threads listing let the user decide to break out "categories" into sub-divisions or just a long general bucket of threads... Or maybe this forum software does that already? or more than likely no one really cares to invest the effort to add more organizational ability? I can understand that too
Moderators always have different ideas about how and where threads need to get grouped..... some do a good job and others are way too consumed with their tiny bit of power of trying to manage organization/conversation. Good content will always organize itself, especially if posters are asking specific questions and getting good replies. Create a general structure for folks and let the threads fall into place (there's more than enough self-correcting control types out there to make sure not too many people are say asking IOS questions to an Android forum

)
Anyway, just some thoughts.....
~ScottGeek