That seems really high based on my UK experience. The link says "the average mobile connection sent 51 messages per month". What does it mean for a "connection" to send messages? Could that include messages sent to the user? If so, this number would make sense (OTPs and spam).
>>jhugo+(OP)
It's the only comment in a long and pointless Europe-does-this/no-it-doesn't that has found any statistics at all, so I think it's reasonable to accept it, unless much more detailed statistics can be found.