New user registration after Penguin. Why can't I send text messages?

Whether fixed dialing is turned on. Confirm whether the fixed dialing service has been started: after the fixed dialing is started, you can only send information to the contacts in the fixed dialing list, but not to other numbers. If you want to continue sending SMS, please cancel the fixed dialing service. Enter Settings-Applications and Permissions-System Application Settings-Telephone-Mobile/Unicom/Telecom-Fixed Dialing, and turn off fixed dialing.