Differences between MAP versions:

MAP Phase1:

Basic supplementary services are supported, but CAMEL and GPRS functions are not. The supported basic supplementary services are BAOC and BOIC.

MAP Phase 2:

CAMEL and GPRS functions are not supported. Based on the supplementary services in phase 1, the supplementary service functions are enhanced, for example, call waiting, call hold, and multi-party cakk.

MAP Phase 2+:

 The main difference between phase 2+ and phase2 is that phase 2+ supports CAMEL and GPRS functions. CAMEL phase 1 and CAMEL phase 2 are supported in MAP Phase 2+ only. The added GPRS functions are mainly intended to complete joint location update by GSM/GPRS mixed users. In addition, new functions, such as the LCS, are added in phase 2+.