I am jealous of seeing the possibilities of TP-Link MR600 and TP-Link MR200(EU) V3/V4, MR400(EU) V2/V3, MR6400(EU) V3/V4 .receiving the firmware upgrade that enables manual selection of 4G+ Bands. I have TP-Link M7450 MiFi, expensive portable wifi but actually very capable and reliable for day to day usages. The last firmware update for my M7450 is dated 2018-08-17.
Seeing that M7450/M7650 is 4G+ capable device, I'd like to see TP-Link develop a new firmware that allows user to manually select the 4G+ bands. Currently, I am often connected to slower bands and not getting 4G+ signal/speed when I should be getting 4G+ all the time if the device is connected to the right band on my telco's network.