Among other things, generating a dynamic digital data file for transferring to a mobile communication device includes receiving from a user a phone number associated with a mobile communication device. Also, a user selected digital data file is received. Authorization to access the received digital data file is verified. When detected that the received digital data file is verified as an authorized file, the user is able to edit the received digital data file to generate mobile content. A data connection with the mobile communication device associated with the received phone number is also established. Further, one or more operational parameters of the mobile communication device based on the established data connection are determined. The generated mobile content is transcoded into a format compatible to the determined operational parameters, and the transcoded mobile content is delivered to the mobile communication device.