When user drives the PWRKEY of Charge-only mode SIM908 to a low level voltage for a period of time ( please refer to Figure 13 : Timing of power on module ), the SIM908 will power up and go into charge mode during normal operation. In this case, SIM908 sends out result code as following:
From CHARGE-ONLY MODE to NORMAL MODE
In Charge mode during normal operation,all operation and AT commands are available.