How Will You Connect The HP Printer To The Mobile Phone via 123.hp.com/setup? Firstly make sure printer hardware is in a working condition Ensure that the mobile device and the printer are using with the same WiFi network . Now download the HP ePrint App through 123.hp.com/setup on your mobile phone Next, choose the data usage preference on mobile and click on the “Done” Option. Now the “Home Display” on your mobile will prompt a window. Here choose the “Grant Permission” for the setup and also adding your email account. Now proceed with the instructions on the screen to easily access the file you want to print. Now Open the HP ePrint App to print any document or file. Hit on the File Now go to the file folder and choose the document to print. Finally, the process complete. Now you can connect hp printer to mobile via 123 hp.com setup.