Cellular technology is an IP minefield. However, as long as you stay small and do it for educational value and fun -- you're OK.
Also -- there's a big difference between making a call and sustaining the call across handovers, dealing with base stations from different manufacturers, etc...
Just imagine if next to the commercial services the government actually reserved an amateur cell network for open use. I guess wifi is the closest we will ever get.
But what if somebody gets a number in the wrong place and their call drops every other call in the cell?
So makers have to suddenly start hardening their cell controllers against bad packets, the cost is passed onto users by some networks, others just crash whenever anyone with an XYZ brand phone starts a call.
That's like saying "What if we let people develop open source web browsers?! They might make a mistake that causes a buffer overflow on my webserver, then I'd have to harden it!"
"In many states, power companies are required to buy any "negative" power that comes from home or business users, at a slightly higher rate; this is known as "net metering.""
exactly my point. This involves you gettign an expensive heavily enginered power converter built by a certified company, installed by a certified electrician and then approved by the power companies inspector.
Now imagine anybody with a spare bit of wire was allowed to connect anything to the grid to test what would happen?
Cellular technology is an IP minefield. However, as long as you stay small and do it for educational value and fun -- you're OK.
Also -- there's a big difference between making a call and sustaining the call across handovers, dealing with base stations from different manufacturers, etc...