The results of marketing research carried out by PENTOR in March 2009, concerning the knowledge and use of international telephone calls showed that Telegrosik card is the most popular card for cheap phone calls. 40% of respondents stated they knew Telegrosik and 57% of questioned declared they made calls abroad. This makes Telegrosik card the undisputed leader.

Over the last three months, every fifth respondent telephoned abroad. The survey participants the most commonly used mobile phone (50%) and a landline telephones of TP S.A. (29%). As much as 9% of respondents carry out international calls using Telegrosik card on a regular basis..This is the highest score among respondents to a cheap calling cards. Other cards for cheap phone calls were mentioned by 0-1% of the respondents.

The research was conducted in March 2009 on a representative sample of 1,019 Poles aged 15 and over.