Click VPN, as Picture 4.14, input VPN user name and password, click connect.
4.5-3 Network sharing and portable hotspots
Portable WI-FI hotspots
2.1.1. Click setting application in main menu.
2.1.2. Click more when wifi is well connected, open Tethering & portable hotspot
Picture 4.13
Picture 4.14
Picture 4.15