When Was the Last Time You Switched Cell Carriers?

Everyone hates their carrier, right? That's just a thing. They're either so huge that you get ripped off and can't get any customer service, or they're so small that their service coverage is weird and their handset options are lousy. But it increasingly seems like there are viable alternative options. Like Republic Wireless 's $20-a-month unlimited plan. It's actually solid and now the company is offering the Moto X. Is that tempting? Do you have some crazy grandfathered plan from the late 90s ...