4G

[BlackadderV]

I access the internet via an O2 mobile 4g dongle. Occasionally, like now, the coloured light changes to show that it is operating on 3g. I notice no discernable difference in speed or performance, so what's this 4g all about?

[Old_Geezer]

It'll probably use 4G when it needs to, and switches back to 3G when it doesn't. It's all about faster communication of data over the mobile phone airways.

[BlackadderV]

Thanks. The vast majority of time it is on 4g. I think I need to read up on this.