Welcome to the HP Support Community. I'd be happy to assist you.
Mobile fax service via HP Smart app is free for a limited time and a limited number of pages. HP has the right to disable the service at any time for any reason for anyone or all users. HP has the right to delete accounts and all related files, records, and access. Please review the terms of service by clicking here.
To know how to setup and use Mobile Fax, click here.
For more info and FAQ's on Mobile Fax, click here.
Hope this helps! Keep me posted.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!