Although the new Snom One mini is advertised as "The sleek, pint-sized, solid state device supports 20 extensions and offers the full range of snom ONE telephony features".
This information is incorrect, as the full range of (now discontinued) Snom ONE telephony products, Free, Yellow and Blue, do not limit the amount of auto-attendants, hunt groups and ACD's. On the Snom ONE mini, although not revealed on the website, datasheets, etc. there is a limit of 1 hunt group, 1 auto-attendant and 1 ACD.