iansltx Posted January 2, 2021 Author Share Posted January 2, 2021 On the way back to Austin, noticed that more sites are now running 15x15 B2, which nets speeds like this with 20 MHz n71: There's definitely overlap between lightly loaded low band NR and unoptimized 40 MHz n41. EDIT: Also saw 15+20 MHz B41 on the way back, on Sprint (above 2600 MHz). GOt 134/6 going down the highway, so TMo seems committed to providing keep sites with sufficient backhaul. Back in Austin, B41 from the n71/n41 site seems a bit more reliable now, pulling -102 RSRP and ~130 down, though lack of HPUE on my S20 means I was only able to push ~2 Mbps up (which is I'm sure why B41 isn't prioritized, to the point that last week my brother's g fast sat on B2 even right next to the tower). Quote Link to comment Share on other sites More sharing options...
iansltx Posted January 9, 2021 Author Share Posted January 9, 2021 Sprint B41 has been moved up so the top carrier is sitting at the very top of the band (2680 MHz center frequency). I'm sure this impacts coverage a little but in return they seem to be back to 2CA here, so I can hit ~150/10 1500' from the cell site again. TMo really does need to add more n71 sites around here though; a couple miles south of me appeared to be LTE-only, and they have plenty of sites that they could retrofit. Of course, if they're planning on adding n41 and n71 simultaneously to a site or two, fair enough. Quote Link to comment Share on other sites More sharing options...
iansltx Posted January 16, 2021 Author Share Posted January 16, 2021 They've dialed in n41 a bit more on the site with it nearest me. Getting the signal back to the cell site appears to be a serious issue, but still, progress! Forcing B41 at the same exact location gets me about half that speed, and I'm sure n41 is already carrying more traffic than TMo B41, so...not bad, I guess. Quote Link to comment Share on other sites More sharing options...
iansltx Posted February 15, 2021 Author Share Posted February 15, 2021 So, all of my nearby T-Mobile sites are offline right now due to blackouts. Closest signal is B12 in the mid -120s...no B71 etc. Fortunately the Sprint rooftop site near me still has power somehow, and TMo very recently (last hour or two) added back a B41 carrier centered at 2680 MHz, next to the 2660 one, so connectivity is fine as long as you're close enough to the site to get B41. B25 is a mess though...probably 26 as well. 1 Quote Link to comment Share on other sites More sharing options...
greenbastard Posted February 16, 2021 Share Posted February 16, 2021 9 hours ago, iansltx said: So, all of my nearby T-Mobile sites are offline right now due to blackouts. Closest signal is B12 in the mid -120s...no B71 etc. Fortunately the Sprint rooftop site near me still has power somehow, and TMo very recently (last hour or two) added back a B41 carrier centered at 2680 MHz, next to the 2660 one, so connectivity is fine as long as you're close enough to the site to get B41. B25 is a mess though...probably 26 as well. Same in Houston. Areas with blackouts have a lot of T-Mobile sites down even though they have permanent gas generators on site. My guess is backhaul is an issue. Sprint network is useless in these areas as well as they take on T-Mobile users who are roaming. 1 Quote Link to comment Share on other sites More sharing options...
iansltx Posted February 16, 2021 Author Share Posted February 16, 2021 11 hours ago, greenbastard said: Same in Houston. Areas with blackouts have a lot of T-Mobile sites down even though they have permanent gas generators on site. My guess is backhaul is an issue. Sprint network is useless in these areas as well as they take on T-Mobile users who are roaming. Stuff's somewhat recovered here cell network wise, though the Sprint site I was using before is now offline. TMo finally figured out how to run B41 again from the NR-enabled site, which is nice, as that covers a mile or so radius, including a fair number of folks without power. Quote Link to comment Share on other sites More sharing options...
greenbastard Posted February 18, 2021 Share Posted February 18, 2021 On 2/16/2021 at 12:05 PM, iansltx said: Stuff's somewhat recovered here cell network wise, though the Sprint site I was using before is now offline. TMo finally figured out how to run B41 again from the NR-enabled site, which is nice, as that covers a mile or so radius, including a fair number of folks without power. A lot of Houston sites have generators. yet they're still going offline with the blackouts. What a huge disappointment on T-Mobile's part. Even now that most of the power is back, sites are staying offline. AT&T kept working even through the blackouts, yet T-Mobile offered absolutely no roaming for basic calling/texting. Total disappointment. There needs to be some type of local and state investigation on the failure of basic communications. It's unacceptable. My guess is backhaul failed for T-Mobile. You can also tell that T-Mobile now owns Sprint as that network also failed miserably. Back during Hurricane Ike, Sprint kept going even with the power outage. Not your time around. Quote Link to comment Share on other sites More sharing options...
shaferz Posted February 19, 2021 Share Posted February 19, 2021 What kind of generators are in use? Natural Gas fired? From what I understand, natural gas delivery is also an issue. Diesel? Gelled up diesel could cause problems as well. Neither of the above issues would happen during a hurricane. Not making excuses, just pointing out that sometimes even backup ideas fail, 2 Quote Link to comment Share on other sites More sharing options...
greenbastard Posted February 22, 2021 Share Posted February 22, 2021 On 2/19/2021 at 11:01 AM, shaferz said: What kind of generators are in use? Natural Gas fired? From what I understand, natural gas delivery is also an issue. Diesel? Gelled up diesel could cause problems as well. Neither of the above issues would happen during a hurricane. Not making excuses, just pointing out that sometimes even backup ideas fail, Generators in my area are all Natural Gas. I also know that my area never lost natural gas. The natural gas outage was very limited to a few areas in Houston, so it wouldn't have impacted T-Mobile's ability to fire up their generators (it sure didn't affect AT&T). Quote Link to comment Share on other sites More sharing options...
iansltx Posted February 26, 2021 Author Share Posted February 26, 2021 Confirmed that the site behind the Randall's at Spicewood Springs and Mesa in NW Austin has n41, as well as some pretty well optimized B2. Will swing by at some point later to get panel shots. 2CA B41 was also deployed but latency/jitter were unreasonably high for some reason. Quote Link to comment Share on other sites More sharing options...
iansltx Posted February 28, 2021 Author Share Posted February 28, 2021 80 MHz n41 is now live in Austin! Center frequency is 2607.75 MHz, so the carrier runs from 2567-2647. B41 2CA is below that. That could leave room at the top of the band for one or two Sprint B41 carriers, but the site nearest me on Sprint has been down since nearly two weeks ago so I'm not sure what's there. 1 Quote Link to comment Share on other sites More sharing options...
iansltx Posted February 28, 2021 Author Share Posted February 28, 2021 Looks like 80 MHz is not yet universal; the Spicewood Springs and Mesa site is still running 40 MHz, while the Spicewood Springs and 360 (up the hill a bit) site is running 80. The former overlaps basically completely with the bottom half of the latter. Both sites appear to have 2CA B41 deployed right below (as in, eating into guard bands of) the NR carrier (2538, 2558 center freqs). The site near 360 appears not to be backhaul limited 3 Quote Link to comment Share on other sites More sharing options...
iansltx Posted March 13, 2021 Author Share Posted March 13, 2021 Just confirmed that I *can* connect to 312-530 Sprint sites still...got near one, hand-picked, and was good to go.l, including N41, which is still deployed at 2CA here at 2640, 2660, and 2680 MHz, in addition to TMo's 2538 and 2558, in addition to their n41 carrier (80 MHz centered at 2607.75), though I've only been able to get 2CA B41 anywhere. The bizarre thing is that this means the lowest Sprint B41 carrier basically completely overlaps the top of the TMo n41 carrier. But...I guess that's why I can't actually get n41 at my place anymore. VZW deploys DSS and T-Mobile goes "hold my beer, we're going to cram 180 MHz of band 41 into 160 MHz without bothering to do DSS". Quote Link to comment Share on other sites More sharing options...
mdob07 Posted March 13, 2021 Share Posted March 13, 2021 3 hours ago, iansltx said: Just confirmed that I *can* connect to 312-530 Sprint sites still...got near one, hand-picked, and was good to go.l, including N41, which is still deployed at 2CA here at 2640, 2660, and 2680 MHz, in addition to TMo's 2538 and 2558, in addition to their n41 carrier (80 MHz centered at 2607.75), though I've only been able to get 2CA B41 anywhere. The bizarre thing is that this means the lowest Sprint B41 carrier basically completely overlaps the top of the TMo n41 carrier. But...I guess that's why I can't actually get n41 at my place anymore. VZW deploys DSS and T-Mobile goes "hold my beer, we're going to cram 180 MHz of band 41 into 160 MHz without bothering to do DSS". The overlap is weird, I wonder if someone forgot to push a config change in that area. Here the lower Sprint B41 carrier was shut down about a month before T-Mobile n41 was widened to 80MHz. You'd think someone at T-Mobile would notice the noise and interference on their N41 carrier. Quote Link to comment Share on other sites More sharing options...
iansltx Posted March 27, 2021 Author Share Posted March 27, 2021 More upgrades! My nearest n41 site can now hit 500+ Mbps down over its 80 MHz channel. ...and in even more recent news, n71 is live on the site to the south of me (Burnet and Justin are the nearest cross streets). Hit ~200 Mbps down on what appeared to be LTE alone, interestingly preferring B12 as the PCC. When taking advantage of NR, I was able to hit as much as 90 Mbps up! On the same site, it appears VZW has mmW, though I'm not sure if it's active yet. Ordered a Visible SIM to check further. No CBRS from what I can tell. VZW definitely has a sweet spot where you can hit 200 Mbps from them as well. Also confirmed that they're running n2 at 15 MHz DSS there. No n66, which makes sense as apparently both they and TMo only have 2 10 MHz channels to play with. 2 Quote Link to comment Share on other sites More sharing options...
greenbastard Posted March 27, 2021 Share Posted March 27, 2021 I was able to hit 200+ Mbps on B41 LTE from the site at Banister and 290 on the south side. Pretty impressive since I've never achieved these speeds on B41 in Houston or Galveston. One thing I have noticed about Austin is that a lot of towers aren't doing CA properly. In East Texas my phone will always attempt to aggregate at least three carriers, no matter how weak of a signal I have. In Austin, getting a weak signal usually mean no CA at all which leads to awful service. Quote Link to comment Share on other sites More sharing options...
RAvirani Posted March 27, 2021 Share Posted March 27, 2021 43 minutes ago, greenbastard said: One thing I have noticed about Austin is that a lot of towers aren't doing CA properly. In East Texas my phone will always attempt to aggregate at least three carriers, no matter how weak of a signal I have. In Austin, getting a weak signal usually mean no CA at all which leads to awful service. This is likely due to HPUE. Carrier aggregation gets disabled when HPUE comes on so maximum RF power laws are not exceeded. It's possible HPUE is enabled on sites in Austin but not in east Texas. Quote Link to comment Share on other sites More sharing options...
greenbastard Posted March 27, 2021 Share Posted March 27, 2021 6 hours ago, RAvirani said: This is likely due to HPUE. Carrier aggregation gets disabled when HPUE comes on so maximum RF power laws are not exceeded. It's possible HPUE is enabled on sites in Austin but not in east Texas. I'm talking about Band 2/4/66/12/71 aggregating. My bad, I should have specified I wasn't talking about a weak B41. Quote Link to comment Share on other sites More sharing options...
iansltx Posted April 3, 2021 Author Share Posted April 3, 2021 Swung over to Fredericksburg to get vax'd yesterday. Looks like there are now multiple n41 sites SE of town, including the one that went live in December or so. 40 MHz centered at 2653.35. speeds are 250-280/15-20 because they're usually anchored by 5 MHz B2 or B66. CA with 20x20 n71 there should let things break 300/30 easily. Interestingly, they figured out how to cram in a 20 MHz Sprint B41 channel centered at 2626 MHz. This is a bump from the 15 MHz I saw previously. Assuming 5% guard bands on each side exist on TDD like they do on FDD, that means they have a 350 KHz guard band between NR and LTE. Maybe they have to do some PRB blanking as well, but NR and LTE aren't broadcast from the same site so maybe that helps. 312-250 is rather widespread there, with B25 in the G block and either 5 MHz at 1953 or 10 MHz at 1955 depending on which tower you're on. CDMA is in another non-contiguous block (1940-1945, looks like), while TMo B2 is 1970-1975. In short, PCS is a mess for TMo. AWS isn't really any better in terms of what they've deployed: 10 MHz in AWS-1, plus another 5 MHz in AWS-3 I'm pretty sure. Not sure if they own any other AWS there. By contrast, VZW has the same 4/66+66+13+2 setup as in Austin, at 10+10+10+15, with 4CA, but without n2 DSS. Quote Link to comment Share on other sites More sharing options...
iansltx Posted April 7, 2021 Author Share Posted April 7, 2021 The spectrum Tetris continues! T-Mobile now has 20x20 B2 LTE here (centered at 1955 MHz), using their 25x25 contiguous block from 1945-1970. CDMA is down to 1x-only, one channel wide (plus 1x in 800 I assume). GSM is at the top and bottom of the band, plus maybe a channel that overlaps 1x somehow. I assume H+ is in between the LTE channel and the 1x channel; spacing seems right, and TMo doesn't have H+ in AWS here. I believe this also subsumes Sprint's secondary B25 carrier here, which was just 5x5 anyway; I'm seeing 10x10 on Sprint, including PCS-G. B41 is still live, but when I connected it wouldn't give me CA. Will be interesting to see when stuff gets reconfigured again. If I had to guess, the next tweak will be when CDMA goes away, at which point they could start running 2/25 MFBI/MOCN on the big B2 block, and switch the old Sprint B25 carrier to n25 entirely. Depends on what % of their customer base are on 5G phones at that point I guess...and whether any sites can even do n25 right now (guessing the new L1900 equipment can). Quote Link to comment Share on other sites More sharing options...
greenbastard Posted December 1, 2021 Share Posted December 1, 2021 Not NR related, but T-Mobile has begun decommissioning Sprint sites inside the urban area of Houston. The Sprint equipment that serves two heavily trafficked shopping strips has been taken down. It's an end of an era for CDMA. On a different note, Dish has been adding several sites here in Houston. In my area, their network will be more dense at launch than Sprint ever was and Verizon currently is. 1 Quote Link to comment Share on other sites More sharing options...
iansltx Posted December 26, 2021 Author Share Posted December 26, 2021 In Fredericksburg now T-Mobile has enough n41+B66 (5+15) sites live (with n71+B71 as well I'm sure, at 10x10 and 20x20, respectively) that the few B2-only areas are now pretty usable. It helps that basically every Sprint site behaves as a keep site, and they all have enough backhaul to hit 70 Mbps on B41 (no CA). B25 is still at least two 5x5 carriers here, which adds to the 312-250 mix. On the flip side, there's only enough spectrum for 40 MHz n41 here. Will be interesting to see what happens to 2.5 once Sprint goes offline, as the B41 carrier basically overlaps n41 in nominal terms, which probably works because the LTE is being served off of Sprint sites, while NR is off of T-Mobile. So I'm not sure that they could get 60 MHz n41 here, and that would make LTE quality dicey again unless they got 2+25+66+71 on every site (and 26 if they can somehow make that work on T-Mobile gear). But, for now at least, T-Mobile is now good enough here that I wouldn't mind recommending them, just like Sprint was good enough to recommend pre-merger. Though VZW still has a site or two where no one else is available. Quote Link to comment Share on other sites More sharing options...
dkyeager Posted December 31, 2021 Share Posted December 31, 2021 On 1/1/2021 at 8:25 PM, iansltx said: Back in Austin, B41 from the n71/n41 site seems a bit more reliable now, pulling -102 RSRP and ~130 down, though lack of HPUE on my S20 means I was only able to push ~2 Mbps up (which is I'm sure why B41 isn't prioritized, to the point that last week my brother's g fast sat on B2 even right next to the tower). n41 requires 100Mhz BW and SA to work well alone IMO, but no problems with other FD TD CA combos. How much n41 SA have you been seeing in your travels? Quote Link to comment Share on other sites More sharing options...
iansltx Posted January 1, 2022 Author Share Posted January 1, 2022 22 hours ago, dkyeager said: n41 requires 100Mhz BW and SA to work well alone IMO, but no problems with other FD TD CA combos. How much n41 SA have you been seeing in your travels? Very little; I'm still in a TNA SIM so the stuff I'm seeing isn't on my phone. Quote Link to comment Share on other sites More sharing options...
iansltx Posted February 2, 2022 Author Share Posted February 2, 2022 In Fredericksburg, T-Mobile is now CA'ing B71 (10x10), B2 (10x10), and B66 (10x10), with additional AWS-3 at 5x5 also available, and sometimes serving as an anchor for n41 (still 40 MHz because Auction 108 hasn't happened yet). Sprint B41 at 2626 MHz is still humming along, with 2-and-change mile range indoors. I don't think I saw my phone on n71 once while in town over the weekend; if I could get NR, it was always n41. Should be fun when they turn on n71+n41 CA there. In Austin, n41 is now a non-event; you have to be deep in a building away from a cell site to drop connectivity. AAHFs have been switched to NR-only at 80 MHz from what I can tell. I expect AT&T to push hard this summer with 3.45+3.7, as this *should* be their market to lose. But T-Mobile has another four months where they're easily at the top of the heap if VZW's lackluster C-Band deployment continues. 2 Quote Link to comment Share on other sites More sharing options...
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