How to Print via Phone: 1.Power on printer. You may have to hold the power button (top left) down for a few seconds if it doesn't come on with one click. 2.Download the “Phomemo” from your app store. 3.Enable Bluetooth on your phone → return to the Phomemo app & click to add device. 4.Selected the M08F-Letter (and the model)- kindly wait for it to pair and connect. It took less than 5 minutes to set-up and print. **If pairing takes too long - reboot the printer by holding the power button down then back on again & return to the app to pair.