You will not need 4G, so do not concern yourself with that. I quickly discovered that their 3G speeds throughout the region easily and quite regularly surpassed 4G speeds I have measured here in the US on several providers.
My memory may be off on this a bit but I could swear, while running a speed test, that I was pulling down 20Mb/sec. I've yet to get that result on Sprint's 4G network. I recognize that Sprint is not the standard by which all others should be compared, but still... I was impressed and surprised.