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Not "always on"

By now you will have heard about the massive outage suffered by O2 this week, if not then go and have a read. In the UK we have four mobile network operators; O2, Three, EE and Vodafone. From those, there are a number of virtual network operators who share these networks; such as Giff Gaff, Sky, Virgin Mobile etc. While these virtual networks appear to be something other than the “big four”, they are simply re-branded versions of them. So when the outage hit O2 in the early hours of Thursday, it......

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