USSD is real-time messaging option similar to SMS where you don’t speak to a person but exchange data during a session based connection with a computer. Most handsets are capable of utilizing this service – all you need is a connection to a GSM network and you are all set.
USSD Pull messages are seen as “pulling in” a client to make use of your service. In other words, the client has to come to you via their mobile phone. The mobile subscriber requests your services through a message towards the Gateway using USSD Short Codes e.g.*100#.USSD is useful for: