 You're listening to Mike Gallagher on Valley News Talk, KPNT, 1020 a.m. and 92.5 fm. You've heard me say now for a long time that cell phone service with pure talk, like the kind I have, is about half the cost of Verizon, AT&T, or T-Mobile. You hear me say every day $20 a month for unlimited talk, text, and plenty of data, and you're thinking, what's the catch?