@Scott9999 Hi, Thanks for the update. Please go to Deco APP>More>Managers and check whether you have signed into the manager account or owner account. We need to sign into the owner account to add an...

@jzchen Hi, Thanks for the details. It is possible to use a third-party Optical Network Terminal/PON ONU Stick with your Internet Service Provider (ISP). However, some ISPs may require specific modem...

@Scott9999 Thank you very much! and how about the main menu after accessing the Deco APP? Is it like the user mentioned here? https://community.tp-link.com/en/home/forum/topic/668798 Best regards.

@jzchen Hi, Thank you very much for the feedback. May I know who is your internet service provider? Is the XPON ONU Stick recommended by the ISP to replace their provided Home Fiber gateway? I think...

@Scott9999 Hi, May I know the current Deco APP version? Could you please refer to this link to help me submit the APP log here: How to submit Deco APP log Can I have a screenshot after clicking "+"...

@Oulu Hi, it doesn't need a wifi password to add the additional Deco X20. Have you tried to hold the reset pinhole for 1s to factory reset this unit first, then add it to the Deco APP again? By the...