Systems and methods for cost effective distribution of files to user devices using combination of broadcast and two-way communication paths

A system of delivering files to user devices using plural transmission phases and hybrid distribution modes comprising:

• at least one communication interface configured to interface with a first transmission system that employs a one-to-many, one-way communication channel to send a file to a plurality of user devices, and a second transmission system that can perform one-to-one communications via a two-way communication channel with respective ones of the plurality of user devices;
• a human machine interface configured to receive user inputs specifying a file to be delivered to targeted ones of the plurality of users, the file having been divided into file parts that can be used to reassemble the file;
• a memory device for storing information comprising an identifier corresponding to the file or its delivery instance;
• and
• a processing device configured to:
• transmit a first set of the file parts during a first transmission phase that uses the first transmission system while withholding a second set of file parts not included in the first set;
• receive, via the two-way communication channel, communications from a subset of the targeted user devices that include at least one of a request for missing file parts of the first set of file parts and an indication of how many of the first set of file parts have not been received by the corresponding targeted user device;
• update the stored information in the memory device with information relating to at least each of the target user devices for which communications were received via the two-way communication channel, wherein the updated stored information indicates how many of the file parts have been received at each of the targeted user devices based on the received communications;
• and
• transmit, to one or more of the subset of the user devices and based on the updated stored information, the missing file parts of the first set of file parts in a second transmission phase using the second transmission system that employs one-to-one communication, via the two-way communication channel.