Very frustrating.  Even when you do a full factory reset... the tether/phone app has MORE options than the web admin page and I discovered that the router is bound to the prior owner.  I cannot reset that.  Tp_link is useless to reset it either..

So guess what... I learned all this because my work told me a brute-force attack at an RPD port on my work laptop was happening from a Russian VPN address and the device originating the attack was the mac address of my ROUTER.

SO this is a GIGANTIC secuity hole.  DO NOT BUY THIS ROUTER... YOU CANNOT SELL IT TO ANYONE ETHICALLY AS IT IS BOUND TO YOUR EMAIL IF YOU ACTIVATE CERTAIN FEATURES IN THE TETHER.

If anyone knows how to delete a prior owner's bind... that would be great.  Factory Reset does NOT work.