Computer printing proves core hardware works. The phone may be on guest/cellular isolation, lack the print service/app permission or be discovering a stale printer address. Confirm the phone and the printer are on the same network name. Turn off cellular data and any VPN for one test.
Differential
Likely causes of “Printer works from computer but not phone”, and how to tell them apart
- 1
The phone is on a guest network or a different network
What separates it The phone cannot see the printer at all, and the computer prints well over a wired or a main connection.
How to confirm Confirm the phone and the printer are on the same network name.
- 2
A VPN or cellular data is taking over
What separates it The phone finds nothing while cellular or a VPN is on, and it works when both are off.
How to confirm Turn off cellular data and any VPN for one test.
- 3
The print service or app is missing or not allowed
What separates it The print option is grayed out or the printer never appears, and the mobile print service is off.
How to confirm Enable the phone's print service or open the maker's app and allow local network access.
- 4
The phone is looking at a stale printer address
What separates it The printer appears in the list but jobs never leave, since the printer received a new address.
How to confirm Compare the printer's current address with what the phone saved and refresh discovery.
Before you touch a setting
Record this first — changing settings destroys the evidence
- The network name the phone and the printer use.
- Whether the maker's app or the built-in print service is used.
- The printer's current IP address and whether it changed recently.
Try in this order
0 of 4 completedCapture the exact symptom
ReversibleConfirm phone and printer use the same local network and disable cellular/VPN for one test.
Run the smallest isolation test
ReversibleOpen the official printer app, refresh discovery and compare the printer’s current IP with the computer queue.
Correct only the proven cause
ReversibleEnable the supported mobile print service and correct guest-network isolation; avoid resetting the printer.
Verify before changing anything else
ReversiblePrint a photo and PDF from two phone apps.
Stop boundary
When this stops being a self-service repair
- !Avoid resetting the printer's network settings unless discovery fails from every device.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Do I need the manufacturer's app to print from my phone?+
Often not, since the built-in print services work with most modern printers. The app helps for setup, scanning and status.
Why does the computer print but the phone not?+
The phone may lack the right app or network access.
Is AirPrint on?+
Check support.