Ok, Thanks

I sugested this directly as Firmware enhancement, this would be so beneficial for creating Car Hot Spots, for any MiFi !
Would probably be good, if more people would request this feature directly by sending a polite message to TP-Link Support:
Request for Auto-Power-On for MiFi as Firmware Enhancement: 
Either as a Setting-Option that enables on/off if MiFi should turn on automatically when USB-Power is connected.
OR automatically when there is no Battery detected and USB is connected, that the MiFi turns on.

@Skylion 

Great idea!

@Skylion @Kevin_Z

Hi, this is my scenario.

I need a remote control stand-alone.

There is a M7200 with a mobile sim and a raspberry pi that creates a reverse ssh tunnell with a cloud server.

The problem is that the wifi goes into standby and I can't connect anymore.

I'm trying to ping from the RPi (to M7200, to server & broadcast) at intervals but it doesn't always work right now.

The final solution will be to directly use a wifi card on the RPi that closes and reopens the connection every time it falls.

It would be great to be able to reactivate the wifi by sending USSD codes to the mobile sim of the M7200.

Thank you   

Totally +1 i took this 4g router ti use It as car router, and i'd like to position It in My car Trunk, but would be Impossible without auto Power on,

2019 post and function still isn't there, i think icm going to send It back to Amazon and take another brand.