@Marvin_S > I want to use LTE band selection fuction with MR400 v3. > https://community.tp-link.com/en/home/forum/topic/241534 I want to use the LTE band selection function, so I obtained the...

@Marvin_S Thank you for your reply. > Did you upgrade firmware via web interface of the router on a computer? Yes, via web interface. >Please verify the country code and hardware version of your...

I was not able to update(downgrade?) firmware to LTE_GATEWAYv3_1.11.0_0.9.1_up_boot(200325)_2020-06-12_15.48.55.bin. I always get an "Errorr code: 4503 The uploaded file was not accepted" How can I...