Would someone be knowing which of the following class the MC75 belongs to:

Class A
Can be connected to GPRS service and GSM service (voice, SMS), using both at the same time. Such devices are known to be available today.
Class B
Can be connected to GPRS service and GSM service (voice, SMS), but using only one or the other at a given time. During GSM service (voice call or SMS), GPRS service is suspended, and then resumed automatically after the GSM service (voice call or SMS) has concluded. Most GPRS mobile devices are Class B.
Class C
Are connected to either GPRS service or GSM service (voice, SMS). Must be switched manually between one or the other service.

I need to write some test cases based on the expected behaviour of the device. Also would be of great help if we can understand the behavior of the device, combined with the Class and the Network Operations Mode, which is set by the Operator of the N/W:  Network Operation Mode I
          When the MS is already engaged in a (E)GPRS data transfer, an incoming

          GSM call causes the (E)GPRS data flow to be suspended. While the MS is in

          Data Session, GSM calls can only be accepted if the network is type NOM I.

          Once the GSM call is terminated the (E)GPRS transaction will be resumed.

          Network Operation Mode II

          The Paging procedure for circuit switched services can not operate by the

          Serving GPRS Support Node (SGSN), because a PPCH does not exists in NOM

          II. GSM and GPRS-Paging are realized over the conventional PCH. So when

          the MS is engaged in (E)GPRS data transfer; User may not receive an

          incoming call.

          Network Operation Mode III

          The Paging procedure for circuit switched services can operate by the Serving

          GPRS Support Node (SGSN), because a PPCH exists in NOM III. Packet

          oriented services use the PCH and circuit switched services use the PPCH to

          perform the paging procedure. PCH and PPCH are located in different

          frequency channels and time intervals. Hence MS can perform both Voice call

          and Data transfer simultaneously.