https://www.thefanclub.co.za/how-to/how-setup-usb-3g-modem-raspberry-pi-using-usbmodeswitch-and-wvdial

https://www.raspberrypi.org/forums/viewtopic.php?t=75493

http://raspberry-at-home.com/installing-3g-modem/

Bus 001 Device 004: ID 19d2:0031 ZTE WCDMA Technologies MSM MF110/MF627/MF636
Bus 001 Device 004: ID 19d2:0031 ZTE WCDMA Technologies MSM MF110/MF627/MF636



sudo apt-get update
sudo apt-get install ppp usb-modeswitch wvdial