T-Mobile teams up with Ericsson for new 2.5GHz 5G achievement


T-Mobile has been placing a focus on its 2.5GHz 5G rollout lately, with coverage recently expanding to 81 new cities and towns. And now T-Mo has announced a new achievement using 2.5GHz spectrum.

T-Mobile teamed up with Ericsson to achieve a peak cell throughput of 5.6Gbps using a single 100MHz channel of 2.5GHz spectrum. The demonstration included a 16-layer multi-user multi-input multi-output (MU-MIMO) setup.

In the test, T-Mobile connected eight OnePlus 8 5G phones to the same 5G radio and used MU-MIMO to reuse the same radio resources for many users on the same cell at the same time, as well as beamforming to direct the streams in specific directions.

There were 16 unique streams of data being transmitted at once and each one was able to hit more than 350Mbps. Since there were two data streams going to each device, some devices were able to hit more than 700Mbps. T-Mo says the eight OnePlus 8 5G phone averaged speeds between 650-733Mbps.

T-Mobile also touts that this trial showed “phenomenal” spectral efficiency. Typically you see single digit efficiency, but in this test, T-Mo was able to achieve 50+ bps/Hz of spectral efficiency.

“The reason why this is so significant, the more we can squeeze out of the spectrum, the more users we can serve and the more data each user can use,” explained Egil Gronstad, T-Mobile’s senior director of Technology, Development, & Strategy.

“At scale, this technology means T-Mobile could connect massively more devices to the same cell infrastructure and still deliver blazing fast speeds to all of them without compromising performance and that means wireless companies will be able to deliver even better 5G performance to even more people,” T-Mo added.

T-Mobile says it aims to begin deploying this 16-layer MU-MIMO technology in 2021. Until then, you can hit the link below for a video showing T-Mo and Ericsson’s trial in action.

Source: T-Mobile

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  • Tmo_User

    And in the meantime, I still can’t get 4G or even 3G in some places.

    • Shaun Michalak

      Name a company that is not true about??

      • Tmo_User

        Name a place that T-Mobile covers better than the duopoly.

        • Angel T

          T-Mobile Park Stadium in Seattle. All wooded areas of western washington. Coastal beaches, especially when boating. It might be their home state, but they certainly have it more covered than any other carrier. The network maps on Opensignal and other network mapping apps prove it as well as personal experience.

        • Tmo_User

          I wish I could say the same here in Orange County, California where at&t very seldom had coverage gaps. T-mo’s coverage isn’t terrible, but they are no match for them. The reason I left AT&T is because they would “nickel-and-dime” me all the time and I got tired of it.

        • Dummy Up Meathead

          Do you have a current phone? If not, that would explain your issue.

        • shawn murray

          i have been all over orange county and i have no issues at all 5g everywhere and like at lest 50 to 70 mpbs. so im not sure what you are talking about what phone do you have.

        • bkat11

          Tampa FL

        • Jay Holm

          Since the closing of the Tmo/Sprint merger, I don’t think we can use the term “duopoly” anymore. It is pretty much a level playing field among The Big 3.

        • Shaun Michalak

          Hmm.. How about Hazel Hurst, PA.. Or Pierpont, OH.. I mean, the competition there is intense with AT&T.. wait.. AT&T has no coverage in those areas.. lol

        • slybacon

          Jackson Hole, Wyoming

        • Dummy Up Meathead

          New York City

  • Sharti24

    Can’t tmobile use all of the Sprint 2.5Ghz spectrum at once. I think they own something like 160Mhz

    • Shaun Michalak

      Yes, they can.. But the thing is, most companies will hold some of their spectrum in reserve so if they get something new, they can implement it, and not have to make their current installation worse to do it.. For example, if T-Mobile used all 160mhz, and then needed to use 60 mhz of that for testing of something new, or say they come out with 6G, and it is before they want to take 4G down.. Then what?? They got nothing in reserve.. So then they take that 60mhz from the installed use, then suddenly people start complaining because their 500mb down just dropped to 300mb down, and suddenly, people are all complaining and screaming bloody murder..

      So yea, they “could” install all of it, but if something happens later, they are then trying to figure out how to “not” make their service worse, and still get done what they want to get done, and still make people happy.. It is a thin line to accomplish all of that, that they have to deal with.. The only good part is now that thin line is much wider as they now have more room for error..

      • marque2

        No – 5g phones only support up to 100mhz wide bands. Better phones will support two 100mhz bands, lesser only one.

        Problem is the bands have to be continuous. And due to the nature of Tmobile 2.5ghz – there are a lot of groups that use small blocks in between. Tmobile might have 250mhz but if ever 50mhz some other group using a 5mhz block then Tmobile can only provide 45mhz on the stream. This will be a big problem for Tmobile especially since one of the squatters is AT&T which really doesn’t want to help Tmobile out.

        • Shaun Michalak

          I think you are looking outside of the original question.. They did not ask if they could use all of it connected to one device.. They asked, is it possible to use all of it at once.. Yes, they could use all of it at once, just not on one phone.. The tower may connect me to frequencies 2500 to 2550, and then connect you to 2570 to 2600.. This is just an example, but it is possible, looking at being installed on the tower end that is.. Even if they had to install 2 antennas to do it.. Now if they asked, “can it all be used by one person, on one cell”, then your answer would be more accurate to that question.. But on the service end, yes they can install of it, and use all of it.. Just not to one customer with one device..

        • marque2

          You have no idea what you are talking about.

        • shawn murray

          and neither do you it seems

        • Shaun Michalak

          I will just say this..

          A1 telecom in Australia uses, or has 100 – 140 MHz of spectrum
          installed for 5G use on the 3.5ghz range.. China telecom and unicorn
          both have 200mhz installed.. Finland has 130mhz.. and I could go on.,.
          Verizon, right here, in the US, has 400mhz of 28ghz installed.. Finland
          has 800mhz of 26ghz installed..

          Use your own judgement.. If you think I am wrong, that T-Mobile can not install all of its 160mhz of b41 at the same time.. Then ask yourself how Verizon can install 400mhz of spectrum at once??

        • marque2

          I wrote some more posts. But basically the 5g spread spectrum algorithm needs continuous spectrum to get the max 100mhz. If there is a small gap because someone else is using a bit of your spectrum somewhere in the middle that breaks the continuity and that break has to be your end boundary. The 2.5ghz band has been used a long time and other groups use small bits of it, so even though on paper tmobile has 250 mhz, it is like Swiss chase with lots of small breaks therefore not allowing full use of the spectrum. I wrote a few more detailed post which you can check out since this seems difficult grasp.

          Maybe this might work – your house may be 60 feet wide, but you can’t walk from one side to another because walls are in the way. So you don’t have 60 feet of continuous space. And therefore when you live in the place instead of being able to use one huge room, you have to choose to use the much smaller rooms one at a time, no? And you don’t have an algorithm that would allow you to use two at once. You can’t be in one room and in the room on the other side of the wall at the same time. 5g channels are the same. If blocked by walls they have a much smaller room to work in and with only one or two 5g channels on current phones that is a problem. Maybe in two years 5g phones will support more channels and be able to use “more rooms” at once. And these other services which use small parts of the band represent the walls.

        • Shaun Michalak

          OK Answer me this then.. A1 telecom in Australia uses, or has 100 – 140 MHz of spectrum installed for 5G use on the 3.5ghz range.. China telecom and unicorn both have 200mhz installed.. Finland has 130mhz.. and I could go on.,. Verizon, right here, in the US, has 400mhz of 28ghz installed.. Finland has 800mhz of 26ghz installed.. and yet you claim that T-Mobile can not install 160mhz of 2.5ghz spectrum on their towers?? Explain to me why all these other companies can do it, yet you claim it is impossible and I do not know what I am talking about??

        • marque2

          You might want to read what I wrote it explains it completely. But I guess for you. There are two channels in top tier 5g phones each can use 100mhz of spread spectrum bandwidth, but each 100mhz section must be continuous. The algorithm does not work over a gap. Obviously China and Australia found fairly large contiguous bands. T-mobile’s band is fairly chopped up so that most often they can’t find two channels that have a contiguous 100mhz. So the two channels in tmobile case are used suboptimal and there isn’t a third / fourth / fifth channel available yet on the phone to take advantage of all the chopped up noncontiguous bits.

          Note, as I mentioned as well, lesser phones, like the LG Velvet, are using only one channel of 5g.

        • Shaun Michalak

          That goes both ways.. As I first said, I said “installed on the tower” not the phone.. You keep implying the phone can not use all of the bandwidth at once.. I stated that they could install all of it on the “tower” at once, not the phone.. You also have not explained to me why, say they do not have a continuous 100 mhz on the tower.. Say they have frequencies 2500 to 2580, and then 2600 to 2640..

          You claim that you could connect to the 2500 to 2580, but have given me not one reason, bit of evidence, or anything else, why me, with a different phone, could not connect to the 2600 to 2640 range while you are connected to the 2500 to 2580 range.. or even why they can not install that 2600 to 2640 along with the 2500 to 2580 range at the same time, on the same tower.. and I hate to disappoint you, but “you are just being silly” is not an answer.. that states that you do not have an answer.

          Facts please..

        • marque2

          I think your being rather silly and are changing the subject after realizing you lost the argument. Yeah tmobile must be holding back, because if they did something really expensive that only you could think up they could provide infinite bandwidth for all!

        • Johnny Olesen

          Why does the bands have to be continuous? New modems like Qualcomms X60 can do carrier aggregationon 5G NR.

        • marque2

          The phones do aggregate. They have one or two channels depending on the chipset. If you have two 100mhz channels your phone will aggregate. Those two, but the spread. Spectrum algorithms don’t work with holes so if tmobile has a 105mhz window, and some other company is using 5mhz right in the middle you will have to aggregate the two 50mhz windows. You now don’t have the opportunity to use the second channel for another 100mhz. That is just the way spread spectrum algorithms work.

        • Johnny Olesen

          Marque2 am I missing some important knowledge about 5G NR?
          I am asking because I cannot make any sense of what you are describing.

          I do not see the problem. When doing Carrier Aggregation on 4G LTE, If you combine (or aggregate) two 10 MHz bands into one 20 MHz band the speed is comparable to one normal 20 MHz channel.

          On 4G LTE:

          10 MHz = roughly 75 Mbit/s download
          20 MHz = roughly 150 Mbit/s download

          2 x 10 MHz CA = roughly 150 Mbit/s download

          The New Qualcomm X60 will do carrier aggregation on 5G NR. In you example, you can combine two 50 MHz channels to one logic 100 MHz channel. That is the promise om Snapdragon X60.

          Do carrier aggregation work differently on 5G NR?

        • marque2

          I don’t know how to explain it better. 5g channels can connect up to 100mhz of spread spectrum bandwidth and there are at max two channels. The spread spectrum algorithm does not allow for a gap, so if someone else is using a small part of your 100mhz spread and say it is right in the middle, you channel will only be able to use 50mhz. So now instead of using the other channel for an additional 100mhz – you are stuck using it on 45mhz on the other side of the 5mhz gap. The 2.5 ghz spectrum Tmobile has is very old and has lots of holes where other groups are using small chunks – this prevents you phone from smoothly using the full 100mhz spread spectrum it is capable of under ideal conditions. Unless these other groups are removed tmobile 5g phones therefore won’t be able to perform at maximum theoretical output.

          It is a continuous function problem if you remember that from math. I suppose I could use dashes and holes as an example as well.

          Here is one 10 wide band

          Here is a second


          Right now phone can use all 10 from the first and all 10 from the second. Now lets pretend an “emergency service” uses one of the spaces in each now we might have



          Now the bands are cut and in the first one the phone can access a max of 5 because that is the largest contiguous space and 7 in the next because that is the largest contiguous space (I don’t want to complicate things but you could also try to use as much as possible in one band – let’s say the first, but then the one channel to the left would use 5 and the other would use the 4 to the left and there isn’t any other channel now to access the second bans)

        • Johnny Olesen

          I really can not follow you logic. If you are using one 100 MHz channel on band 41 you can have a throughput of estimated
          876.38 Mbps download and 417.81Mbps upload per user (256 QAM, 2 layers, TDD). If you take two times 50 MHz on the same band the throughput will be around 426.95 Mbps download and 203.55 Mbps per 50 MHz. Try doubling the numbers and you get the carrier aggregation numbers.

          So if you are doing carrier aggregation you can see that there is a small loss using two x 50 MHz compared to 100 MHz, but the loss is not significant. Or you could do 4×4 MIMO on one 50 MHz channel and in theory get 853.9 Mbps download and 203.55 Mbps upload per user.

          I do not really care about what phones on the market can do at the moment. I only care about what is about to be unveiled next week and it will be an iPhone with Snnapdragon X60 modem inside unless Apple pulls out a rabbit in form of there own 5G NR modem.

          In that context it is really not important if T-mobile has 100 MHz of uninterrupted bandwidth on band 41 as long as that have a lot of bandwidth to use.

        • marque2

          No hope for you then. Sorry I couldn’t explain the situation to you.

        • Shaun Michalak

          Unless I am mistaken, when T-Mobile first installed 5G, back when they were still using the LTE core, don’t you remember them saying that they could get those higher speeds connecting to the 4G networks at the same time.. This means connecting to band 2 and 4 and 12 at the same time, with band 71m which was the only band that they had 5G on at the time..

        • marque2

          They use the 4g for non data access protocols.

        • Shaun Michalak

          Actually, when they did it, they were testing speeds, and only speeds.. They stated that they could get the higher speeds jumping off of multiple bands, including the 5G band.. but that was back when they relied on the LTE core for 5G too.. I know that they say that the new X60 chip allows them to connect to both, SA 5G and LTE networks at the same time, including low, mid, and or high bands, for faster speeds.. So I doubt that they are only using it for non data access.. At least, that is not the way that Qualcomm advertises their new chip..

        • marque2

          Um you only have 2 five g channels in the best phones – most phones only have one. You don’t have half a dozen channels in 5g like you do in 4g to aggregate. Maybe in a few years when the technology advances. And even so I would rather aggregate 4 – 6 full 100mhz bands than to use all my channels to try to aggregate one 100mhz piece of swiss cheese. So the point is Tmobile can’t provide full spread spectrum bands until they can clear the others out – and that will take some time – as some of the owners are direct Tmobile competitors.

    • marque2

      No for two reasons. The 5g phones allow for two streams 100Mhz wide. Some phones like the new Velvet only support one stream.

      Secondly the 100mhz has to be continuous and unfortunately the 2.5ghz band has been used by many groups so the tmobile may have 160mhz but there are holes. Often the biggest contiguous block is less then 50mhz so that is all they can supply in the location.

  • Kaulana1989

    X55 modem can do 5G sub-6 GHz specs: 200 MHz bandwidth, 4×4 MIMO

    • marque2

      I am guessing the 4×4 MIMO is for 4g

      • Johnny Olesen

        why not for 5G NR also? 5G NR can also be used with 4×4 MIMO

        • marque2

          Because there are a max of two channels for 5g the most you could MIMO is 2×2. And then most phones only have 1 5g channel to work with, MIMO 1×1 I suppose. I am sure in 3 or 4 years you will get your dream.

  • George Salcedo

    T-Mobile recently told me to turn of my 5G due to texting issues with 5G. Get it together with 5G T-Mobile!