Me too, mine only gets connected to one band 3, even if selected band 3 on both channel. Will test it at different location over the weekend. Would be great if it gets connected two same bands and...

@magico111 https://community.tp-link.com/en/home/forum/topic/166506 magico111 wrote but for change bands on TL-MR6400 v3 ?????

@Ravi-Bajaj ah thanks for confirming Ravi-Bajaj wrote @Minix Yes i have first updated to latest version and then gone to Beta version and again vice versa😅😅

@cbzvenki were u able to downgrade firmware to beta? Hi, anyone tried the latest official firmware >>>Archer_MR600v1_1.2.0_0.9.1_[200511-rel44954]_up_boot_2020-05-11_16.11.10<<< then downgrade back...