I wouldn't say the speed "changes" so much as the reliability varies. 4G will be 4G. However Verizon has more/stronger towers, meaning more reliable 4G coverage, meaning a likely connection with top speeds more often than not. Sprint, though unlimited, has spotty coverage, so technically it's 4g, but you're not guaranteed to reach those max speeds and you'll be more limited to where you even get it (pretty much only in major cities). So if unlimited is your vice, then you're pretty much stuck with Sprint. But just to share, every person I know with Sprint hates it because of connection issues and is waiting for their contract to end, even with unlimited data. I hear AT&T sucks all around. As music life said, you get what you pay for.
The thing with Verizon is the customer service reps are idiots. Their policies are solid, and when things are finally done they're reliable, but everyone who works for them is just clueless. Yeah it sucks not having unlimited data anymore, but that will become standard before it goes away. I use my phone pretty heavily, and I almost NEVER go above 1gb because of wifi.
Out of curiosity, what happened with Verizon that pushed you away forever?
