Device, system and method for managing channel and/or talkgroup assignments

Managing channel and/or talkgroup assignments. A memory stores a first list of channels associated with a device identifier 171 of a mobile device, and a second list of channels associated with: an identifier of a user 172; and attributes of the user. A controller: receives, from the device, the user identifier indicating a log-in to the device by the user 101; selects a subset of the first list of channels (fig.6), to be temporarily assigned to the mobile device when the user is logged in, based on the attributes of the user; and transmits, to the mobile device, a combined list that includes the subset of the first list of channels, and the second list of channels, to enable the mobile device to communicate using channels in the combined list. The user attributes may include a role, rank, agency or position in an organization, such as public safety. The entire first list may be sent to the mobile device after a user-independent log-in, and replaced by the combined list after receiving an indication of the user log in. The combined list may be filtered based on device capability, status, accessories, location, or number of participants in a channel.