It's the only reliable way to get a lower price plan where I live.

That's what I thought, too. But nonetheless, I stayed with the budget provider who was trying to shake up the market. I chose them solely because they were cheap.

When mobile plans started getting really competitive, they quadrupled my data (to over 10gb/mo) for free, no questions asked. So now I'm probably going to be a customer of theirs for life unless they start raising the price on my grandfathered plan.