Routers
The main purpose of the modem is to conceal its own MAC address and of devices that use it to access the Internet by changing IMEI upon restart.
Execution algorithm - new IMEI is assigned to the radio module upon every launch of device what makes cellular network operator to register new device that was never registered in its network before. If you change a SIM-card, you'll get completely new modem with new name in certain cellular network operator.
While connected through the modem, all the devices are concealed since modem acts as local hotspot.
VPN connection with all outgoing traffic encryption is enabled upon successful connection.
There are three menus in the modem
1. SSID hotspot and it's password
2. IMEI devices and VPN connection to the server
3. VPN mode (VPN-only disable/enable). When enabled, internet connection will drop if modem lost connection with VPN server