your device need access to the server (by LAN, WLAN or VPN)
in any browser you can use the adress
http://servername/hub (or maybe https if http is not allowed)
in any browser except Internet Explorer, Edge and Chrome you have to login with your windows-account
make sure the user you are logging in as is:
1. The user is created and active in QMC
2. Has security permissions to access the app either at app level or stream level.
3. Has been assigned a user access token or your server has active login access tokens available for the user dependent on how you assign them.
The most common user authentication method is via windows authentication and accessed via the Hub as Martin has outlined above.
Ive acessed my hub from Android and IOS phones, tablets and PCs and a variety of browsers with no issue except Edge can sometimes have issues woth missing functionality.
Hope this helps.