How to turn on the GSM+BLE without pressing the On/Off key

I want to make a project where the GSM+BLE module is power by a DC adapter. When there is power from the DC adater, the GSM+BLE module is turn on immeadiately without pressing the On/Off key. is this possible?

The board turn on when usb is connected. I have the same concern. I want the board boots to run the code not on mass storage. Hope someone has a solution for this.

Has anyone found anything out about this?

I want to have it power up when 3.5V is applied as it is hidden in an enclosure.

Do we know is this is a physical reason or the firmware needs changing?