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BlackadderV | 17:24 Fri 14th Nov 2014 | Internet
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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?

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

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