@yaughan 

Guys - i connected external antenna and signal improved alot, now signal is always > 50%, 4G+ with ( band 40 + 40). 

https://www.aliexpress.com/item/32883289247.html?spm=a2g0o.productlist.0.0.23996a9eEmRqY2&algo_pvid=7644a87c-b65a-48a0-9f0d-9215548f4ea3&algo_expid=7644a87c-b65a-48a0-9f0d-9215548f4ea3-2&btsid=6dd39295-a604-4db5-931f-5c4f5baa929c&ws_ab_test=searchweb0_0,searchweb201602_2,searchweb201603_55

@Kevin_Z, OP here. Thanks for the delayed response. TP-Link's engineer is being vague. How can something be "more" hardware than firmware? Please confirm.

Also confused by your original reply. Do you expect Three UK to change their infrastructure, based on a single misprogrammed modem? The vast majority of their customers with 4G+ devices are happy.

When will TP-Link be updating its UK website and Amazon page to reflect that this item does not work as advertised for Three UK customers? The MR600 is promoted in the UK as a "4G+ router" without exceptions. Other 4G+ modems sold in the UK support CA1+3, such as the Huawei B715s, as well as all 4G+ mobile phones.

Regards,
Jon

@pMR600 the sad reality is that tech in LTE modems is inferior to phones, despite mains power and external antennae.

In my example, the base station is 250m away and I achieve "100%" with high SNR. Yet I'm still leaning at mad angles in the loft with the MR600, if I want to achieve the same speed as our Samsungs manage in the cellar.

If it worked, 4G+ would help boost this medium signal strength.

@Kevin_Z 

I am also confused, the router supports band 1 and 3 separately.. And can bond 3+7 so whats so different to bond 1+3

Also details in the admin showing what band your connecting to would be great too.. 

@yaughan 

MR600 uses Qualcomm X12 LTE Modem.  Same is being used in iphones 7. I think is more of firmware issue, which is not optimized. 

Snapdragon X12 LTE Modem

• LTE Technology: LTE FDD, LTE TDD, LTE-U, LWA, LTE Broadcast
• Cellular Technology: WCDMA (DB-DC-HSDPA, DC-HSUPA), TD-SCDMA, CDMA 1x, EV-DO, GSM/EDGE
• Downlink LTE: LTE Category 12 (600 Mbit/s). 3x20 MHz carrier aggregation. Maximum 6 spatial streams. Up to 64-QAM. Up to 4x4 MIMO on one carrier
• Uplink LTE: LTE Category 13 (150 Mbit/s). 2x20 MHz carrier aggregation. Up to 64-QAM
• Samsung 14nm LPP process
• Chipsets: Snapdragon X12 LTE Modem, Snapdragon 820/821 processor, Snapdragon 660 Mobile Platform, Snapdragon 630 Mobile Platform, Snapdragon 636 Mobile Platform, Snapdragon 670 Mobile Platform, Snapdragon 675 Mobile Platform, Snapdragon 665 Mobile Platform

@pMR600

Not sure that's right the x12 is Cat12 the mr600 is only cat6 

Hi all, not sure what the issue is my MR600 does support three 4G+ in the UK.

I was, up until yesterday, using an MR200 on three, but now I am using an MR600 and am getting 4G+ (LTE-a) straight outof the box.

Three masts in my area use bands 3 and 20 - see screen shot below.

With the MR200 I was using a MikroTik mANT m50 omni antenna, without an antenna I was getting about 25mbs down and 15 up.

With the mANT mounted in the loft on 2x 1m MikroTik SMA tails I now get 50 down and 30 up.

To be fair, I swapped over to the MR600 and 4G+ and the speed has only moved to 53/32, so barely even notied any uplift.

I spoke to three mobile tech services today, they said the masts in my area all have 4G+ capability, but my masts are only rated as good, not excellent.

He estimated that I was probably on the upper end of maximum for my area, and moving to 4G+ may not make much of a difference other than quality due to the penetration of the 800mhz band.

I have noticed on the ookla traces the lines are much flatter and stable compared to the swingin up and down I had before.

They also complete the test much faster than before, so although the speed has not moved the quality seems much better and the ping has droped from 55 to around 30.

@Selyah 

 Interesting that you get 3 + 20.. Most of us are on 1+3 I guess your lucky haha.. I might have to call three and ask about different bands..