by hanke » 07/04/2020
I have the SIM card from Fongo as well, but I dont have any Credits, so whenever I try to send a SMS it says I cant. When I make a call with the Fongo app same thing should I call someone outside of the Fongo system (another country) says no World Lines Credits, so nothing goes through. The Fongo Sim is just data, only charges you could incur would if you exceeded your data plan limit.
I have never been charged anything unexpectedly, so you should be ok. Hope this helps you.