Fax and mobile phones
A phone can start a fax. It cannot be the device that picks one up.
"Mobile fax" covers two questions with opposite answers. Sending from a smartphone or tablet works: the browser only shows the Faxturbo form and lets you attach the file, and the call is placed from our platform. Sending to a mobile number does not work, with any provider. A fax needs a machine at the far end that answers and negotiates in sound, whereas a mobile rings for a person and the cellular network alters the signal. That is why Faxturbo accepts landline numbers only.
Why mobile networks cannot carry a fax
Every transmission starts with an agreed series of tones: the sender signals, the receiver answers, and the two compare resolution, speed and paper size. Without a reply within about half a minute, the caller gives up. A phone gives no such reply; it only rings for its owner.
Even if a fax device were attached to a SIM, the call would pass through voice codecs such as AMR or EVS, which keep only what makes speech intelligible. Listeners cannot hear the loss. A modem, which stores data in the phase and amplitude of the sound, sees errors everywhere and loses the link within seconds.
Fixed networks that moved to IP overcame this with T.38, which sends the fax data instead of its sound. Mobile operators do not provide it on consumer subscriptions, leaving an ordinary voice call as the only path, and it fails.
Three situations, three answers
People searching for "mobile fax" nearly always mean one of the following.
You are on a phone and need to send a document
No problem. Open Faxturbo in your phone's browser, pick the file from your storage or take a photo, and type in the recipient's fax number. The call uses our line, so your plan is untouched, nothing is installed, and a single page costs nothing.
The recipient only has a mobile
Then there is no fax machine to reach. Email the document or use a messaging app. Fax remains useful for organizations, clinics and public bodies that have equipment to receive it.
You want faxes delivered to your phone
That takes a virtual fax number from a specialist provider, which receives faxes and forwards them to you as email attachments. Faxturbo only sends and issues no numbers; our page on receiving faxes describes the options.
What the form verifies
Before anything leaves, Faxturbo compares the number with the landline format of the chosen country. A French number beginning 06 or 07, for example, is refused with an explanation before you reach the confirmation step. One gap exists: in Canada, landlines and mobiles share area codes, so no automatic check can tell them apart. Ask your recipient to confirm that the number is a fax line.
This protects you. Without it the attempt would fail after repeated retries, or would send a screech of tones to a stranger's phone. A quick refusal is better than believing your document was delivered.
Fax and mobile: common questions
- Some sites say they fax to mobiles. How?
- They do not send a fax. Typically they text a download link. The recipient needs a smartphone, has to follow the link and accept the download. No fax machine takes part, and there is no transmission report.
- Can a messaging app replace fax?
- For reaching an individual, yes, and it is often easier. But it is not a fax: the recipient's device returns no confirmation, and many organizations refuse documents received that way.
- Can I fax using an iPhone or an Android device?
- Use the browser; no app is required. Complete the Faxturbo form, attach your file (PDF, photo, Word and other formats, up to 100 MB) and submit. A confirmation email arrives; tap its link within 3 minutes, then follow the transmission live on the same phone.
- How can I recognize a mobile number in another country?
- Each country has its own mobile prefixes: 06 and 07 in France, 015 to 017 in Germany, 04 in Belgium, 3 in Italy. The country pages show the expected format for every destination; in Canada only the recipient can confirm.
Keep exploring
More pages to help you prepare, send or track a fax.