@David-TP Mr David do you know if the devs look into this matter (proper Band Lock) and plan to issue an updated firmware with a fix? Many thanks.

@Will_K My best speeds are with N78 but the signal is stronger for N28 or N1. I had a zte MC801A 5G router. I could choose N78 and it stayed connected to N78 all the time without changing to N1 or...

@Will_K Did you find any solution...? I have similar problem. https://community.tp-link.com/en/home/forum/topic/706162?page=1

@David-TP I downgraded to firmware 1.1.3 but I get the same problem. See the screenshot. I specifically selected N78 but the router is connected to N1. So I upgraded again to 1.1.7. Hope this gets...

@David-TP Please see the attached screenshots to understand. I have selected bands N78, B1, B3, B20. After a while the router connected to band N1 that I have specifically not selected.

@David-TP Thank you for your reply. My sim carrier is Cosmote (Greece). I had a ZTE 5G router before I got the X50-5G, using this same SIM card and I could select and lock the bands (N78, B1, B3,...