Not sure about Archer A7, but some devices won't flash the FW file if it's not newer than the current one. Also you can't upgrade with FWs from a different region or HW version.

@Osama-Orabi You can see more detals here. I would say that these messages are normal, cause sometimes PPPoE session drops and has to be re-established.

@Osama-Orabi Exchanging DHCP server messages between your ADSL/VDSL modem and your devices connecting to it - IP address offer and acknowledgement. Also exchanging some PPPoE authentication messages...

According to your device FW version you're on the latest. Here's the official versions. If you suspect strange device behaviour you can hard reset (methid 1) the device and try again.

I understand your point, but the power adapters are developed according to the device consumption requirments.

You can change the 2.4GHz band channel from the wireless settings when the Smart Connect is off. You can try different channels to see if tat will improve the wireless connection stability (for ex....