Section: 4.2.4.3 Substate when back to state GMM-DEREGISTERED from another GMM state
Content: When returning to state GMM-DEREGISTERED, the MS shall select a cell as specified in 3GPP TS 43.022[ None ]  [82] and 3GPP TS 25.304[ None ]  [98]. The substate depends on the result of the cell selection procedure, the outcome of the previously performed GMM specific procedures, on the GPRS update status of the MS, on the location area data stored in the MS and on the presence of the SIM/USIM: - if no cell has been found, the substate is NO-CELL-AVAILABLE, until a cell is found; - if no SIM/USIM is present or if the inserted SIM/USIM is considered invalid by the MS, the substate shall be NO-IMSI; - if a suitable cell supporting GPRS has been found and the PLMN or LA is not in the forbidden list, the substate shall be NORMAL-SERVICE; - if a GPRS attach shall be performed (e.g. network requested reattach), the substate shall be ATTEMPTING-TO-ATTACH; - if a PLMN reselection (according to 3GPP TS 23.122[ Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode ]  [14]) is needed, the substate shall be PLMN SEARCH; - if the selected cell is known not to be able to provide normal service, the substate shall be LIMITED-SERVICE.