Text calls about 90%!
I'd better explain a bit . I didn't have a cell phone untill last Christmas. I never needed one before, and in fact I still never do. But our daughter's school is a bit difficult to reach from where we live. So it's either me or my husband who brings her; in the evening it is more difficult. Sometimes she can drive back home with another girl; but that sometimes changes without notice. As it is difficult to send phone home during the day, we thought it would be easier if she would be able to just send a message to me (she did already have a cell phone) . So, that's why I use it for mostly! Of course, since my family knows my number, the often send me messages too now

So another advantage is that I can send her messages too now (like: how was your math's test )