- 2.4.23 : CN29 for SIM holder CN29 : SIM card holder Pin Signal Pin Signal C1 SIM_PWR C2 SIM_RESET C3 SIM_CLK C4 Reserved C5 GND C6 SIM_VPP C7 SIM_DATA C8 Reserved C8 C5 51 CN29 C4 AEWIN Technologies Co., Ltd C1 43 EM-6333 User Manual