SIM800L Failed - No Communication

This is the first time I found, my SIM800L modules registering to the network, but AT commands not working.
I reset the module by pulling low the reset pin.Then I get below failed message from 115200 baud rate.

image

Still AT commands does not respond.I tried another same batch module.Still the same.How to get it work?

Flash the firmware.

Thanks.

I have this tool.


But Don't know what firmware to use? Any link for the firmware?

Simcom?

There website does not work.Thats why every SIMcom users struggling...!!

Maybe they don't want to support cloned boards...