@Solla-topee Thank you for your quick reply. Yes, the label under router does read MR6400 (EU) v4. So, if I try to install the firmware, I should have no problem? Or it will give me an error message...

I would like to know if this available band select TL-MR6400(EU) V3/V4 LTE_GATEWAY_20200325 (Beta firmware) works with my current 2026 UK build? As I believe is is from 2020. My current build...