MO (= mobile originated)
A message (SMS/MMS) is referred to as MO if it is sent from a mobile telephone to the network of the operator. The operator then either sends this SMS to another mobile telephone number or to an application.
A message (SMS/MMS) is referred to as MO if it is sent from a mobile telephone to the network of the operator. The operator then either sends this SMS to another mobile telephone number or to an application.