Updating firmware on mobile devices can be performed during device management (DM) sessions between mobile devices and one or more servers. A server can provide data to at least one node of a firmware update management object (FUMO) stored at a mobile device. The data can indicate a plurality of different update file locations accessible via a network. The mobile device can download a plurality of update files from the plurality of different update file locations via the network in response to receiving the command. From a set of update files, each mobile device can thus obtain its particular firmware update as a subset of the update files as indicated by its FUMO. Metadata may be provided to the FUMO to express one or more conditions that the mobile device must meet in order to download respective update files.