A method, system, and/or computer program product downloads a blob of data onto a mobile device. A blob of data that is to be downloaded from a server to a mobile device via a particular network is identified. A first maximum chunk size for the first network for the particular network is identified, as is a timeout value for the mobile device when downloading a chunk of data. An optimal chunk size for chunking the blob of data is determined based on the timeout value of the mobile device and the maximum chunk size for the first network. The blob of data is partitioned into chunks of data based on the first optimal chunk size, and the chunks of data are transmitted from the server to the mobile device.