My take on it is that the more sophisticated your phone (i.e. 2G or 3G), the more likely your phone would be affected.
My Wife and I both have O2,but our phones are quite old,(when kids renew their phones, we usually inherit their cast offs) and we've been ok.
Made me chuckle - there must be a new generation of people that have had to use a phone box for the first time in their lives!!

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