Re: "delay the rollout of 4G by 18-24 months"
"I don't need 4G's much-needed higher speeds, and nor do most people. Therefore I have no wish to pay for it (unless it saves me money)."
I thought that too. Then 4G popped up in my area and my phone started using it.
It's not just faster, it's more stable and reliable and holds a signal whilst moving much better - for a greater distance. I don't think it costs me any extra, and battery life is improved (because certain things that used to grumble away for several minutes on a slow link are over and done with in a second).