Hi, I posted this issue at SNB and now I post it here, I hope @XVortex or other gurus here could help me, thanks in advance. I flashed my EA6900 v1 with Asus Merlin (EA6900_378.54_2) to get Dual WAN function. After the flash, Dual WAN is working, wireless is OK, but the signal is very poor, so I did a 30-30-30 to reset the router, after reboot I found I don't have wireless signal anymore, I checked NVRAM, found that NVRAM was messed up, all mac address was changed to something starting with 00：90：4C, it's not my router's mac address. I found quite a few posts on internet describing the mac address was changed to this 00：90：4C address, ranging from mobile phone to router. I tried to telnet into my EA6900 and manually update the mac address to the correct one, then do a Commit, after root the mac address is still the wrong one, the wrong mac address was in the base linux system, maybe the NVRAM value is fetched from the base linux file every time router boots? How do I fix this, I cannot flash a new CFE now, or can I, can someone show me. I just want to get my router working, does not matter if it's Merlin or get back to stock.