@David-TP 

Thank you very much for your answer

...So I did a factory reset, but nothing happened. The LED keeps turning off for about a second. I bought this NX600 router on July 24th...

One more thing, please(and this is common to both Archer routers I own - I also have an NX500): the LAN/WAN port only works as a WAN port. Am I doing something wrong, or is this known to be a problem?

Thank again fo your attention

  @carn2004 

No worries—I understood what you meant and just wanted to clarify the difference between "locked" and "blocked" for the benefit of future readers. It's good to keep the terminology accurate.

One tip:

If you want to try band locking, start by checking which bands your  device auto-selects during peak hours. You can usually find this on the status page of the UI (if your device, like our NX510v, has one). Make a note of the bands chosen automatically.

When you switch to manual mode (band locking) on the NX510v, the device will scan for available bands—take note of these as well, since available bands can vary by region, carrier, and even time of day.

In our experience, the main issue was with the NSA 4G LTE anchor band. We tried a few (such as B1 and B3) before settling on B3; as always, what works best will depend on your region, carrier, and sometimes just plain luck.

Also, remember your connection will drop when scanning or switching bands, so plan any changes accordingly as users will be affected during these transitions.

Most importantly, enjoy experimenting!

  @David-TP 

Thank you for your support

At that time

1)mbb mode for both

2) Every connection seems (You'll understand that the conditional is a must) work properly

3) I'd say the LED turns off for about 1 second in any situation, on average (very roughly) every 2-3 minutes, but sometimes even less, or maybe a little more, like 5-6 minutes.

I would rule out that it is a problem with the layout of my network because it does it even when connected directly to a single client

could i wait your answer by mail , then?

Many thanks

  @David-TP 

Sorry!

when translating from my language I confused the term "block" with "lock" .

I'm sorry for any misunderstanding I may have caused.

Thank you very much for your help!

  @neounix 

Thanks for the tip!

I agree that the best choice would be an LTE band B1 or B3.

Also taking into consideration that many carriers turn off the higher-performing bands such as B7 at night.

Locking into B7 might give me better performances but with the risk of losing the connection in the evening.      

Bye!

  @David-TP 

Hi David, I tried enabling and disabling it but nothing changes, the WAN/LAN port doesn't work... or do I need to do other tests/settings? Thanks

  @David-TP 
Hi TP link
Does this latest NX200_V2 beta version also contain the changes from this beta version?: 
Archer NX200_V2_20250430 Supported xLAT

Best regards

BobDK