http://hexus.net/ce/news/mobile-phon...-connectivity/

Back in February HMD Global re-launched the Nokia 3310 candy bar phone. It was old, yet new, with a similar feature set to the original Y2K handset and the same 'awesome battery' but delivered a colour screen, 2MP rear camera with flash, slim and light 12.8mm profile, and microSD card slot. Now an update to the simple, colourful, re-launched handset has arrived - the Nokia 3310 3G, with the headlining quality of 3G network connectivity.
The modern Nokia 3310 left some a little out in the cold. It only supported 2G networks. In the UK there is a major mobile network called 'Three' which requires users to operate a 3G or 4G phone. I'm not sure if other countries have networks with similar restrictions. So obviously the Nokia 3310, as announced in Feb, wasn't a practical phone for those on Three, like myself. Note - I've just read a Mashable report that says some Australian and Singaporean firms have closed down their 2G networks already.