Manually mark DO NOT CONTACT for SMS

Your software
My Mautic version is: 4.2
My PHP version is: 7.4
My Database type and version is: MySql

Your problem
How can I manually mark as Do Not Contact for SMS messages?
I know the option to check the contact and then select Do not Contact from the drop-down menu, but it only applies to email messages.

You should be able to uncheck the sms channel:

Thank you for your help!