How can I check the phone number of an SMS subscriber is valid?
If you use the option to collect contacts online, you can set the option to verify the entered phone number during generating of the widget (form). The verification takes place via an automated SMS received by the potential subscriber during registration. This SMS contains a generated code, which the subscriber must enter into the next part of the form, to confirm the given number is actually his. You can therefore be sure your system isn’t polluted with false or somebody else’s phone numbers.
This verification SMS is paid by GoSMS administrator (the who asks the subscriber to get registered – 0,0278 Euro without VAT on the basic speed of 5 SMS per second), not the subscriber.