Why should they?
No reason to "invest" in upgrades, when between Verizon & AT&T, they have the USA market sewed up. Sprint & T-mobile? Yeah right...after the T gets bought by the death star, Verizon will, even though they say they won't, buy Sprint. With AT&T & Verizon owning the market, they can relax and quit spending money to upgrade to better or faster service. Why should they? Don't like the service hahahaha says AT&T, go to Verizon, we don't care. Don't like the service hahahahah says Verizon, go to AT&T, we don't care.