3G/UMTS

SMS Class

There are four different classes (types) of SMS as described below.

Class 0

: The type of SMS to be displayed on the mobile screen without being saved in the message store or on the SIM card; unless explicitly saved by the mobile user.

Class 1

: The type of SMS to be stored in the device memory or the SIM card.

Class 2

: The type of SMS that carries SIM card data. The SIM card data must be successfully transferred prior to sending acknowledgment to the service center. An error message is sent to the service center if this transmission is not possible.

Class 3

: The type of SMS to be forwarded from the receiving entity to an external device. The delivery acknowledgment is sent to the service center regardless of whether or not the message was forwarded to the external device.