I can not yet test my new t09, but for some reason i wanted to know if the sdcard slot was working properly, somehow, my sdcard got stuck in the sdcard slot, so i needed to open the device up to get my sdcard out of it.
Guess what i've noticed, an empty FFC/FPC Connector, where you can still connect something to.
similar like what you mostly see on a tablet and phones.
So was it meant for a battery, screen, microphone, camera or some other sensor?
Anyways, watch out when inserting a SDcard, and its really hard to get it out again, so i'll recommend you to grow long nails before attempting to insert a sdcard (or a flat screwdriver)