iOS sign up and registration for messaging

For iOS users starting with OpenPhone, we’ve streamlined how you sign up and register your number to send texts!

You can sign up directly from the app. The $21/month subscription price for iOS sign up now includes the monthly cost of recurring A2P registration fees. Along with sign up on mobile, iOS users can also complete A2P registration, a requirement for all users who want to send messages from any VoIP number like OpenPhone.

How to complete A2P registration on iOS mobile

You have two options —- mobile or web —- for accessing the process to begin A2P registration and submit the $19 one-time registration payment. Follow the steps below for mobile.

  1. To access A2P registration within your mobile browser, do one of the following:

    • From your OpenPhone number, attempt to message a US phone number. You’ll see a message including a link to start the registration process.

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  • In your workspace Settings, go to the mobile Trust Center and click any link.


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     2. You will be redirected to your external browser to submit a one-time registration payment of $19 

          for A2P. No recurring fee is included in this payment. NOTE: iOS users can also complete this on



  • Whether iOS subscribers complete A2P registration on mobile or web, you only pay the one-time A2P registration fee. You will never be enrolled in recurring A2P subscriptions.
  • iOS subscribers cannot make changes, such as adding users or numbers, or changing plans, on the web. Doing so requires adding a payment method and canceling the iOS subscription to migrate to Stripe for future payments.