Hello Peter,
Exactly. You need VPN License (Cisco AnyConnect Plus License). After you upload it, you will be able to connect through Mobile device...
For e.g. this license I'm using:
L-AC-PLS-LIC=
|
Cisco AnyConnect Plus Term License, Total Authorized Users
|
25
|
I hope that I gave you helpful feedback.
Regards,
Milos