Based on the knowledge sources provided, there is no explicit mention of additional costs specifically for using SMS verification flow on Ory Network. However, it's important to note that SMS delivery is a feature that requires configuration and may have associated costs depending on your plan and usage. According to the [Ory pricing page](https://www.ory.sh/pricing/), different tiers (Production, Growth, and Enterprise) include various features and usage credits. The SMS verification capability is available across these tiers, but the exact pricing structure for SMS usage is not clearly specified in the provided information. For the most accurate and up-to-date information on potential extra costs for SMS verification, I recommend contacting Ory directly or checking their detailed pricing documentation, as the knowledge sources don't provide specific pricing for SMS usage. It's worth noting that Ory Network does support SMS verification, as mentioned in the [SMS delivery configuration documentation](https://www.ory.sh/docs/kratos/emails-sms/sending-sms), which states that "Ory Network comes with an HTTP based SMS delivery option that can be configured to point to any service that supports sending SMS via HTTP API, such as Twilio, Plivo, AWS SNS, or your own microservice." If you're considering implementing SMS verification, you should factor in potential costs from your chosen SMS provider in addition to your Ory Network subscription.