In recent years, more and more countries report passing the 100% mobile penetration barrier. Currently that is the case in most of the EU member states.
However, it is evident that this figure is not the same as 100% mobile ownership.
There will always be those too young, too old or too disabled to use a mobile phone, some who are too poor or simply elect not to use one. The actual number of mobile phone owners differs from the reported penetration.
On one hand, the definition of an active SIM card differs from country to country.
In Hungary, for example, according to the latest reports the number of SIM cards are able to receive a call, is 114.9 per 100 inhabitants. However the number of those SIM cards from which a call was initiated in the last three months is more than ten percent lower: 102.2%.
On the other hand, owning multiple SIM cards is increasingly common.
For further details on this topic a study from Ewan Sutherland can be found on the following link about the challenge of counting the number of mobile subscribers in context of the reality of multiple SIM card ownership.