@OCasasola Hi, thanks for posting question here. So sorry to hear that. How did you find your neighbor hacked your network? I am afraid that hardware version can not be changed. You may also post...

@NotShero Hi, thanks for posting question here. It is suggested to turn off QoS on AX55 for a try and follow this guide to troubleshoot. You may also contact local support for direct help.

@Dunano Hello, thank you for posting on the TP-Link community, and we certainly appreciate all your feedback here. And I'll make sure to log your feedback and pass it along to the related team.

@geo369 Hi, thanks for posting question here. May I confirm what are the LAN connected devices you mentioned? Are they wired or wireless? For the unstable connection issue, it is suggested to follow...

@KevinGM Hi, thanks for posting question here. If your network is unstable, it is suggested to follow this guide. You may also contact local support for direct help.

@AlexUK Hi, thanks for posting question here. It is suggested to follow this guide to check your settings.