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- HP Community
- Printers
- Scanning, Faxing, and Copying
- How do I locate my fax number?

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07-08-2025 09:31 AM - edited 07-08-2025 09:42 AM
Welcome to the HP Community --
The printer does not have any fax hardware.
If you are using HP Mobile Fax,
At this writing, Mobile Fax cannot receive Faxes.
There is no "fax number".
If you are sending a fax,
The fax number is the phone / fax number you were given by the recipient.
-- HP Smart – Mobile Fax –
Android, Apple iOS, iPadOS, macOS, and Windows 10, Windows 11
Not your home site? Click the Flag to change to your region.
Please do read the questions and answers in the FAQ section:
- For example, FAQ > Section What does the Mobile Fax service cost?
- Please review the Terms of Service
- Review HP Privacy Statement
- Below section FAQ > More FAQs
“More FAQs” calls this document - READ
- HP printers - Using Mobile Fax (HP Smart app)
- Note: Mobile Fax supports sending multiple PDF files at a time, up to 50 pages or 20 MB.
- Section “What are the Mobile Fax requirements?”
- Section for “What if a 'Delivery Failed' or an 'SFAPI' error displays?”
- HP Mobile Fax - Error Codes Troubleshooting
Video Example
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NOTE: Until and unless something changes, HP Mobile Fax does not (cannot) receive faxes.
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Message Content References
User Guide - HP DeskJet Plus 4100e All-in-One Series
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References / Resources
HP Printer Home Page - References and Resources
Learn about your Printer - Solve Problems
“Things that are your printer”
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NOTE: Content depends on device type and Operating System
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HP DeskJet 4100e All-in-One series
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