What data, call and sms allowances do you have on your DC's mobiles? We took the lowest for DD, she has a prepaid with 10 MB/month data. This is eaten up just by the basics of running the phone when she's out and about (system services), she hasn't been actively using her data and she's only taken her phone out a couple of times in the month. I've turned mobile data off for now.
She will soon start to go by bus alone to one of her clubs and I want (her) to be able to:
check the bus time table in the app
track where she is
i.e. I need to leave mobile data running when she's out and about. How much data do you think she would need for this?
The next prepaid plans are 40MB, 200MB, 400MB.