I switched cell phone providers in July/August time frame to Ting.com. I switched, while my wife stayed on Sprint because she got her phone in November of last year and the Early Termination Fee would have been horrendous (over $300).
Well, I'd say that switching was a success:
My bills the past three months: $34.85, $32.70 and $26.13.
My wife's bills the past three months: $69.70, $69.70 and $69.70.
This represents a drop of already $30 a month or $660 per year from $129.99 that we were previously paying in our joint phone account. Now, Ting is offering a 25% discount on your ETF's. So, I'll be switching my wife's phone over sooner that I originally expected. This should save us an additional $30 per month.
The only issue may be that Ting does not allow roaming for data. However, since most places we go nowadays either have coverage for Sprint or wifi access, I'm pretty confident this will not be a problem.
I'll update in couple months to let folks know if we are saving even more. If you click the Ting.com link in the first paragraph, you'll get a $25 discount on your first month's service.