Of course there is a cost. So I wouldn’t make a call. But…..say your child at home has an issue and texts or calls. You will see that. You can either - turn on cell data and initiate the 10 a day. Or wait until on Wi-Fi to respond. We go several times a year. And still work when at our condo. So this works great. Incoming texts were five cents last I checked and 50 cents going out.