SIM card issue Q26 elite

I am using Q26 elite module. When powered ON, Iam not getting any wind response and also not getting any responses to AT commands. Then I removed SIM card in the SIM circuit (In Power ON) then Iam getting responses and what I have observed is SIM RST pin is toggling when SIM is peresent. Due to this Iam not able connect to network and Iam unable to get any response.

Power supply?

Take a look at the FAQ/Wiki thread - there’s a load of stuff about power supply problems there: