Abstract: When receiving digital data at a wireless terminal, sources from which received digital data will be processed can be designated at a wireless terminal. When a packet of digital data is received at the wireless terminal, it can be determined if the packet is from an acceptable source designated at the wireless terminal. If the packet of digital data is from an acceptable source, the packet of digital data can be processed, and if the packet of digital data is not from an acceptable source, the packet of digital data can be blocked from processing. Alternate methods of transmitting and receiving digital data and related wireless terminals and wireless service providers are also discussed.