@Sunshine Hi there, sorry for the delay, I was some days offline. The actual firmware is the usual 1.4.0 0.9.1 v0001.0 Build 210805 Rel.63527n. I got the router from an official reseller of used...

@Sunshine looks like I've the same problem. Bought the archer as refurbished in a shop but the firmware update is still not possible. Is the solutions as stated here still available ?