Printing problems

Problem	Fix
Printer not in the list	Switch it on and keep it close, then tap Scan for printers.
"Turn on Bluetooth"	Switch on Bluetooth from your phone's quick settings.
"Could not connect to printer"	Turn the printer off and on, move closer, and try again. If another phone is connected to it, disconnect that phone.
Only half the bill prints, or lines are missing	Turn on Slow printer mode in Settings → Printer & paper → Options.
Text wraps oddly or is cut off	Choose Custom paper and adjust Characters / line — see Paper size.
Paper comes out blank	The paper roll is upside down — the shiny side must face the print head.
Wi-Fi printer not reachable	Check the phone is on the same Wi-Fi and the printer's IP address hasn't changed.
Logo prints dark or blurry	Use a simple, high-contrast logo. Thermal printers print black only.

Still stuck? Email gallapeti@innovait-systems.com with your printer model, or use Settings → Help → Send feedback.