Working with additional Raspberry Pi HAT/Shield


Recently I purchased Raspberry Pi 4G/LTE Shield with long header and it works perfectly with my Pi.

After then I bought new HAT for voice processing but it seems 4g shield is not working because of low power.(no ttyUSB series detected and no blue led blinking)

Is there some way to provide enough power to LTE shield ?

Or maybe my diagnosis is wrong, so any opinions are welcome.

Best Regards.

You can connect an external 5V.