Definition - What does Nonrepudiation mean? Nonrepudiation is a method of guaranteeing message transmission between parties via digital signature and/or encryption. It is one of the five pillars of information assurance (IA). The other four are availability, integrity, confidentiality and authentication. Nonrepudiation is often used for digital contracts, signatures and email messages.
Definition - What does Cellular Network mean? A cellular network is a radio network distributed over land through cells where each cell includes a fixed location transceiver known as base station. These cells together provide radio coverage over larger geographical areas.
Picture, video and group messages are the most common form of multimedia message (MMS), but really any text sent with an attachment is an MMS message. Yes, you need to be connected the cellular data network to send and receive MMS. No, MMS messages require a cellular data connection unless you are using a 3rd party app.