Premium or Essentials should already be on your ASA. Check "show version" or "show activation-key" to verify,
To use either iOS or Android clients, you need the AnyConnect mobile license which works in conjunction with Premium or Essentials. That applies whether you are using 1 or 1000 devices. There is no demo or temporary license that I'm aware of. The cost is only around US$100 so it's not a very expensive investment.
I doublechecked and there is a demo license available. See the licensing question in the Q&A here.
It does require Essentials or Premium as a prerequisite. Most of the newer boxes I have been working on include 2 AnyConnect Premium licenses as the default. I'm guessing you have a slightly older box running something like 8.2 or earlier.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...