@Rider Hi, nice to see you again. It is estimated to be ready in the next two weeks. Best regards.

@asdfqwer2 Hi, welcome to the community. Which stock firmware did you want to install? Would there be any specific reason that you want to downgrade the firmware? Wait for your reply. Best regards.

@AndrewO Hi, welcome to the community. Can I have the model number of the Telephony base station? Is the Telephony service provider also EE？ Wait for your reply. Best regards.

@Jakub74 Hi, nice to see you again. Archer NX600 is still the most updated 5G NR router with the highest Wireless standard. Do you need a more powerful one? How about Deco BE65-5G...

@SayeemAhmed Hi, nice to see you again. Deco itself doesn't support Dual-WAN, but you can add a load balance router in front of Deco, such as: How to use Deco with two ISPs? Best regards.

@Zitz Hi, have you tried the following file: M7450(EU) 2.3 M7450V2.3_recoverFirmware Best regards.