What sim card slot for?

[gabe4utwo]

Opened up a gopro karma drone today to repair took top cover off noticed there is a sim card slot on the side anybody know what's its for

 

[dronelover]

That slot has been interesting for long but as for now, no body has anybody what its for.
Its could be a way for gopro to update and fix firmware as it looks like a small SD card slot.