@GhostBird Please unzip it and upload the bin file to update the firmware. And the most important is that please check the version of the firmware provided by the support, is it EU version or US...

@DGT Hi, sorry to tell you that there is no way to fix it to WPA2 or AES only. You can try to do that on the client devices if they support. Besides, cause the Deco supports mixed WPA/WPA2-AES/TKIP;...

@Oekiee What is the current network diagram? How do you connect them together? Is modem a modem router or just a pure modem？ Is there any error message after you failed to add the third Deco? Which...

@JunkMailKing What is the current network diagram? And what is the operation mode of the Deco M5? Are they still AP mode? What is the model number of the setup box and the new modem? Does setup box a...

@DanielGB Thanks for your reply, cause the linux PC supports 2.4GHz only and the Archer AX50 is a new product with new technology; it seems that the capacity of the wireless adapter on the adapter is...

@mdreds You can refer to this post. https://community.tp-link.com/en/home/forum/topic/171660?replyId=378488