Old 3g (found in bin and brought back to life!)here.
I have no issues with phone calls (on virgin mobile sim only) – better reception than previous phones in fact.
Texting is a joy – making threads out of texts with the same person, speed of entering (you are turning it on its side to type with a bigger keypad?) makes it so much better an experience than previous normal phones.
I have to say I regard it as a mini computer in my pocket as much as a phone though. I use it as much for checking email, the news, the weather, perusing memory map os mapping, listening to music and audiobook, iplayer or internet radio. It would be weird not having this sort of stuff available in my pocket again.
I’d happily upgrade to an iphone 4 or the next one when it comes along for a better battery, GPS and camera but in comparison to the free one I have the gazzilions I’d have to spend would be better spent on something more real life – it is only a bit of plastic and getting too orgasmic about it would be a bit sad.