@Kevin_Z 

Noted since two months and nothing changes yet!!!

@Crellion I asked for the beta FW and was sent it overnight - I have tested.. Cannot see any diffeence nor see the option to alter the band.. I was sent the following:

Dear Customer,

Thank you very much for requesting information about our product.

We recently released a beta firmware for Archer MR600 which can allow us to select 4G+bands for Archer MR600 manually.

For Archer MR600, if you want to use its 4G+network, your SIM card should support the CA bands group Archer MR400 supports. Please check the attached picture and check if your SIM card supports the band groups on the list or not.

Have a nice day.

You may get help quickly by contacting our 24 hours livechat service: https://www.tp-link.com/support/contact-technical-support/#LiveChat-Support

I was actually suppprised and pleased they sent it... 

I am on Three Mobile UK and have no idea how to check the SIM cards DLCA setings? Any ideas?

(Before anyone asks, I caot share the FW)

@darant I have re-installed my Omni antenna and tested on the current official FW: This is the results:

Current Official FW

BETA FW

The Speed Test would not run...

@darant Try to go to the Basic tab, then Internet, and there you should see the option "Band select". Enable it, and then you can choose the band combination.

1 & 5

1&7

1 & 8

*** Failed full test ***

1&20

1&28

*** Failed any test ***

1&38

bu

*** Failed***

1&40

I know not all these are sued by Three but wanted to play... Below are the bands Three have:

Bands 20&3

20&1

*** Failed ***

Band 50 isnt in the drop down so, after 15mins, it seems bands 20&3 are the better... till no 4G+ light on the router..

I have just tried my ee SIM... I now see 4G+

Test results, 3 & 20!

3&7 results...

Finallly, 7 & 20 results

Failed...