Can I fax from my phone for free?

Most fax apps offer a free trial or limited free faxes. For regular faxing, you'll need a subscription. FaxFlow offers weekly, monthly, and annual plans starting at $9.99/week with unlimited pages per fax.

Do I need a fax number to send faxes from my phone?

No, you don't need your own fax number to send faxes. You only need the recipient's fax number. A fax number is only required if you want to receive faxes.

Can I fax IRS forms from my phone?

Yes, you can fax IRS forms directly from your phone. Common forms like Form 2553, 2848, 3911, and 8821 can all be faxed. Make sure to include a cover sheet with your information and verify the correct IRS fax number for your specific form.

Why does my fax say 'sent' but not 'delivered'?

'Sent' means your fax left the app. 'Delivered' means it was received by the recipient's fax machine. If stuck on 'sent', the recipient's line may be busy, the number may be wrong, or their machine may be off. Wait a few minutes and check the status again.

How long does faxing from a phone take?

Most faxes complete within 1-3 minutes for a typical 1-5 page document. Longer documents or busy recipient lines may take longer. You'll receive a delivery confirmation once the fax is successfully received.

What file types can I fax from my phone?

You can fax PDFs, images (JPG, PNG), Word documents (DOC, DOCX), and scanned documents. The app converts everything to fax-compatible format automatically.

Can I fax multiple pages from my phone?

Yes, you can fax multiple pages. Select multiple files or scan multiple pages. The app combines them into one fax. Most plans include unlimited pages per fax.

Mobile Fax Guide8 min read

Last updated: January 2026

How to Fax From Your Phone (iPhone & Android)

You can fax directly from your phone — no fax machine, no landline, and no office visit. This guide shows exactly how to fax from a phone, using real iPhone and Android screenshots, including what can go wrong and how to fix it.

See Step-by-Step Guide

This guide covers faxing directly from a phone. Looking to fax from a computer or fax online via browser? See those guides instead.

Works on iPhone & Android

IRS & business documents

Delivery confirmation

FaxFlow send fax screen with recipient number and details filled

FaxFlow faxes screen showing delivered fax status

Can You Fax Directly From a Phone?

Yes. You can fax directly from a phone using a mobile fax app or an online fax service. Phones don't have built-in fax hardware, but apps convert documents into fax signals and send them over the internet to traditional fax machines.

To fax from a phone, you need one of three things:

Online Fax Service

Converts your document to a fax signal and sends it over the internet to traditional fax machines.

Mobile Fax App

The easiest option. Apps like FaxFlow handle the conversion automatically from your phone.

Physical Fax Machine

Visit a FedEx, UPS Store, or library with a fax machine. This works for one-off faxes, but it's slower and usually costs per page.

All Ways to Fax From a Phone (Compared)

Compare the different methods to send a fax from your phone

Method	Works on Phone	Setup	Best For	Problems
Physical fax machine		High	Occasional in-person faxing	Busy lines, paper jams
Web fax website	⚠️	Medium	One-time desktop use	Mobile browser issues
Mobile fax app		Low	Urgent or recurring phone faxing	File size (50MB max)

Ready to send your first fax from your phone?

Send Fax Now

How to Fax From a Phone: Step-by-Step

Follow these steps to send faxes from your iPhone or Android phone. The entire process takes less than 5 minutes. This is especially useful when you need to send time-sensitive documents like IRS forms, legal paperwork, or signed contracts.

Select or Scan the Document on Your Phone

Open the fax app and choose how to add your document. FaxFlow offers multiple ways:

Files: Select PDFs or documents from your phone storage
Photos: Use existing images from your camera roll
Camera: Scan a physical document with auto-enhancement
Cloud: Import from iCloud (iPhone) or Google Drive (Android)

Tip: PDFs work best. Images are automatically converted but may lose some quality.

Phone fax app - add files screen showing options to select files, photos, or scan

Enter the Recipient's Fax Number

Enter the destination fax number. Include the country code:

US format: +1 (555) 123-4567
International: +44 20 1234 5678
Toll-free: Supported for US and Canada (1-800, 1-888, etc.)

Tip: Select the country by tapping the country code before entering the fax number.

Phone fax app showing fax number input screen with country selector

Phone fax app preview screen showing document pages before sending

Preview Pages and Check Orientation

Before sending, review your document to ensure everything looks correct:

Check that all pages are included
Verify pages are right-side up (not rotated)
Confirm text is readable (not blurry)
Reorder pages if needed

Common mistake: Scanned pages sometimes appear rotated. Always preview before sending.

Phone fax app showing fax sending status in progress

Send the Fax From Your Phone

Tap the send button and wait for transmission:

→Sending: Your fax is being transmitted
✓Delivered: Fax successfully received

Average send time: 1-3 minutes for 1-5 pages. You can close the app — it continues sending in the background on both iPhone and Android.

Get Delivery Confirmation

Once delivered, you'll see confirmation with:

"Delivered" status in the app
Exact delivery timestamp
Email confirmation (optional)
Delivery receipt you can save or share

Pro tip: Save the delivery confirmation for important faxes like IRS forms or legal documents.

Phone fax app showing successful delivery confirmation with timestamp

Why Faxing From a Phone Sometimes Fails (And How to Fix It)

Most fax failures from phones are caused by formatting or delivery confirmation limitations — not the app itself. Here's how to diagnose and fix common issues:

"Invalid fax number" error

Why it happens: Missing country code, wrong format, or the number isn't a fax line.

How to fix: Add the country code (+1 for US). Verify the number is actually a fax number, not a regular phone. Try calling the number first — if a fax machine answers with screeching tones, it's valid.

"File too large" error

Why it happens: Documents over 50MB can't be processed. High-resolution photos or large PDFs often trigger this.

How to fix: Compress the PDF before uploading. If scanning, use standard quality instead of high resolution. Split very long documents into multiple faxes.

Fax stuck on "Sending"

Why it happens: Recipient's fax line is busy, their machine is off, or there's a connection issue.

How to fix: Wait 5-10 minutes and retry. The app typically auto-retries several times. If it keeps failing, try during off-peak hours (early morning or late evening).

"Sent" but no "Delivered"

Why it happens: Some older fax machines don't send delivery receipts. The fax may have been received but not confirmed.

How to fix: Contact the recipient to confirm they received it. For important documents, ask them to fax back a signed confirmation page.

How to Know Your Fax Was Successfully Delivered

Check the fax history in your app to see the status of all sent faxes:

Delivered

Fax received by recipient's machine

Sending / Pending

Fax in progress or queued for retry

Failed

Check error message and retry

Keep as proof: Tap on any fax to see the full delivery details including timestamp and recipient number.

Phone fax app showing fax history with delivered status

iPhone vs Android: What's Different When Faxing

Both platforms work great for mobile faxing, but here are the key differences

iPhone

iCloud integration for document access
Works with iOS 14.0 and later

Android

Google Drive integration for document access
Works with Android 7.0 and later

FAQs About Faxing From a Phone

Got questions about how to fax from your phone? Find comprehensive answers to the most common mobile faxing questions here.

Can I fax from my phone for free?
Most fax apps offer a free trial or limited free faxes. For ongoing faxing, a subscription is usually required due to carrier and transmission costs. FaxFlow offers flexible weekly, monthly, and annual plans with unlimited pages during your subscription period.
Do I need a fax number to send faxes?
No, you don't need your own fax number to send faxes. You only need the recipient's fax number. A fax number is only required if you want to receive faxes.
Can I fax IRS forms from my phone?
Yes, you can fax IRS forms directly from your phone. Common forms like Form 2553, 2848, 3911, and 8821 can all be faxed. Make sure to include a cover sheet with your information and verify the correct IRS fax number for your specific form.
Why does my fax say "sent" but not "delivered"?
"Sent" means your fax left the app. "Delivered" means it was received by the recipient's fax machine. If stuck on "sent", the recipient's line may be busy, the number may be wrong, or their machine may be off. Wait a few minutes and check the status again.
How long does faxing from a phone take?
Most faxes complete within 1-3 minutes for a typical 1-5 page document. Longer documents or busy recipient lines may take longer. You'll receive a delivery confirmation once the fax is successfully received.
What file types can I fax from my phone?
You can fax PDFs, images (JPG, PNG), Word documents (DOC, DOCX), and scanned documents. The app converts everything to fax-compatible format automatically. Maximum file size is 50MB.
Can I fax multiple pages from my phone?
Yes, you can fax multiple pages. Select multiple files or scan multiple pages. The app combines them into one fax. All subscription plans include unlimited pages during your subscription period.

Need More Help?

Whether you're new to mobile faxing or switching from another app, our support team is ready to help you get started quickly.

Get Fax Support

Related Phone Fax Resources & Guides

Explore more guides to enhance your mobile faxing experience

Sending Faxes From Your Phone Regularly?

If you need to fax documents from your phone more than once, a dedicated mobile fax app saves time and avoids common delivery issues. Download FaxFlow and send your first fax in minutes.

Send a Fax From Your Phone

iPhone & Android

Send to 180+ Countries

256-bit Encryption

No Contracts