If you have since experienced an issue of disconnecting or slowness on the 4G Wi-Fi router’s network due to the auto band selection, and you would like to switch the band manually by yourself you can download and install the following beta firmware on your router.
Note: Please note that not all combinations of the 4G bands are supported in 4G+ mode. Only when the router and the SIM card support the same combinations of 4G band in 4G+ mode, the bands might be aggregated successfully.
Archer MR200(EU)_V3/V4, Archer MR400(EU)_V2/V3, TL-MR6400(EU)_V3/V4, TL-MR150(EU)_V1:
TL-MR6400(APAC)_V3 (Update the beta firmware, the previous version cannot be updated on some hardware):
*The official firmware has been released for the below models, you can install the latest firmware via the online upgrade or download it from the official website:
Archer MR600(EU)_V2_200909 and later versions
TL-MR6500v(EU)_V1_200924 and later versions
You will get the band selection option on the Basic->Internet or Advanced->Network->Internet page, based on the model of your devices: