Internet networks are everywhere, SMS seems to be getting abandoned, except for certain circumstances. People nowadays prefer to fill internet packages, right?
This service might be effective for emergencies such as when you run out of internet packages or are in a remote area that does not have internet access. But you have to understand how it works, especially if this service involves a third party, right? then what's the difference with atm and e-money? so make sure you really use a useful service.