Could you please fix this.

I purchased a new one v3 Mr600 router and career agreegation not working here.

It's waste of money.

I tried jio 3+5 not working.

Jio 3+40 not working

40+40 sometime coming only for 1 or 2 sec .

Do we have a beta version to forcefully use 2 bands at a time?

1.1.0 0.9.1 v0001.0 Build 220727 Rel.74013n

Archer MR600 v3 00000002

  @Sunshine 

I have the exact same issue

Firmware Version:‪1.7.0 0.9.1 v0001.0 Build 220826 Rel.58057n

69 pages of this:)

  
did troubleshooting for about 2 weeks with no avail, 2ca worked good with older router, no shenanigans, speed was stable, same simcard, but this router....

4g+ (and led light blinks) only works when speedtesting or downloading a large file 
4g+ also "kicks in" only when streaming video stops to buffer, so 10 seconds of video and 5secs of buffering.
auto or manual, bands 1+3;1+7;1+20; 3+3;3;7+3+20;3+40;7+7;7+20 all do the same thing;.
average speed 4g+ 70mbps; 4g 20mbps;
Firmware Version:‪1.1.0 0.9.1 v0001.0 Build 220727 Rel.74013n Hardware Version:‪Archer MR600 v3 00000002 
ISP Bite Lithuania
(couldnt attach log file here)
p.s. I chose tp link because had a good previous experience with wifi router, please help me im not rich enaugh to buy second router in just few weeks :)
 

  @Dom21 Seems TP-Link doesn't care about this issue. This has been going on for a long time, and still no solution whatsoever. I wouldn't buy another TPLink product for this very reason, unless and until they have come up with a solution / working FW etc. ... Better to buy quality, instead of wasting valuable time (and thus money) with TPL

  @MobileRouter I think you are absolutely right. If I look at V1 of the MR600 the official firmware has bugs the most noticeable being it doesn't display sms messages. Only corrected with Beta versions and the last beta added the manual carrier aggregation which gives the same errors as V2 and V3 on the unit. I have to use Beta versions to get the features the unit is supposed to have but even then 4G+ produces pages of logs switching between 4G and 4G+ every two seconds and isn't stable. Sunshine is very quiet as obviously there isn't going to be a fix. The rest of the features work reasonably well but to get Carrier Aggregation  I use another manufactures 4G+ unit . So you buy a product with a list of features that doesn't work as intended. They churn out new products all the time which looks great but buyer beware,some  won't work as advertised.

  @Dom21 this is true I have also debugged a lot but couldn't find the solution, tp link should fix this issue since this is advertised as the only true 4g+ router 

@Sunshine  you really have to fix this on priority, I have the same logs too. After the firmware 1.7 this issue is popping up so please identify the changes in this firmware and update it accordingly.

  @drewex 

the up Firmware 1.6.0 0.9.1 v0001.0 Build 220105 Rel.58321n works fine for me

the latest one is not

Same issue here, as described below:

https://community.tp-link.com/en/home/forum/topic/653946

If you want further details than what is already posted, then it'll have to be done privately. I am staying with the previous firmware for now, which does not have the constant switching.