Yes, MFA may have costs depending on the following:

• your telco may charge you for receiving SMS text messages. This may particularly be the case when you are abroad (that is while roaming)
• your telco may charge you for receiving phone calls. This may particularly be the case when you are abroad (that is while roaming)

Please inquire with your telephone operator for any costs you may incur into. You simply need to ask if receiving SMS text messages has a cost based on your contract.

Please note, however, that the App does NOT incur into any cost, as it works even while your phone is offline (no internet, no coice covergae, no roaming)!