It might be me .. but I usually find the causes pushed by Lord Adonis to be a pile of old crock...
I don't know about in general but but this one certainly looks like a crock to me.
Imagine a country like the UK that has a pretty good 3G infrastructure. People will buy modern phones capable of 4G. Some of the time they will have 4g and some of the time they will only have 3g. For many purposes, 3g is quite adequate. People here tend to travel about quite freely and move between 4g and 3g areas frequently ands without really noticing the difference on their phones.
Now imagine a country with complete 4g in one city and no phone coverage anywhere else. Only people who live in the city with 4g are going to bother buying a 4g capable phone. Their phones will show pretty good 4g coverage especially if the transport infrastructure is so poor that they rarely leave the city. However, it would be hard to argue that country was in a better place with respect to 4g than the UK.