Re: 3G & 4G
There are a lot more uses than just surfing the internet and checking emails. They can pretty much get rid of the voice network and soon everything would be just VoIP. The phone companies know that and that’s why its being given to us piecemeal. This is what happened to SMS, they kept charging an arm and a leg and it was just bits that went away with the advent of the likes of Whatsapp, Skype and Viber.
That’s what I was thinking too, but I guess nobody wants to invest more money till they squeeze out the last bit from the cheapest tech. (see my comment above about piecemeal
Check and see if your phone is capable of doing 3g. Also check the setting in Mobile Data to see if 3g is enabled. What phone do you have?