Thank you for reply!
If manual repairs not supported oficially, then how Mr. Gennadiy51 has got new license free of charge after manual NAND repair ? Please see above posts.

I have similar issue.
Today MT support refuse license update after NAND replacement for RB493G. As well doesn't offer paid repair.
Think twice before buying MT, one day you will be left behind...

Switching from Hilink to modem (PPP) mode and back possible by stick firmware change. Dig internet on that, there are tons of info how to do that.

The same bandwidth limit issue on e3372 and MT RB912UAG-2HPnD, v6.20. In hilink mode testspeed.net to LMT (in LMT network) shows 50/30, in ppp-out mode 30/20. e3372 configured as 4G modem - AT^SETPORT="FF;10,12".

I'm running RB493G+R52Hn more than a year; in general wireless is completely useless. Constant disconnects, low bandwidth. In Wireless network connection status when WinXP Laptop connected to RB493G+R52Hn Wi-Fi AP no Network name displayed, just empty field. Tried different settings from WiKi and fo...