63035: This operation is blocked because the RCS agent has not launched, the recipient has not accepted the invitation to become a tester, or the RCS sender only works in certain regions.

This operation is blocked because the RCS sender has not launched and the recipient has not been invited and accepted the invitation to become a tester. This may also happen if you are attempting to send to a device with a country code for a region that is not supported by that sender.

The RCS sender is not approved to send RCS messages to this carrier. The RCS recipient has not accepted the invite to become an RCS tester.

Adding AT&T test devices to your RCS sender is currently not supported. In order to send RCS messages to AT&T end-users your sender must be approved for RCS on AT&T. Support for adding test devices will be introduced at a later date in 2026.

If device is RCS capable, accept invitation to become a tester. If the device has already accepted the invitation, please confirm that you are not attempting to send from an RCS sender that is regionally restricted.