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About lordsutch

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    Member Level: eHRPD
  • Birthday December 14

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  • Phones/Devices
    Pixel 2 XL (Sprint); Nexus 6 (Google Fi)
  • Gender
  • Location
    Macon, GA
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    4G Information
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  1. It seems like Sprint has finally decided to roll out band 41 around Macon and Warner Robins; so far there are band 41 deployments on 3 existing sites in Macon and 1 in Warner Robins beyond the replacements for the old WiMax protection sites that went live a few months ago. For some reason, Sprint has also put band 41 mini-macros on the tower right by the intersection of US 23 and SR 18 near the Plant Scherer power station east of Forsyth... basically the middle of nowhere. All I can figure is they changed the tilt of the antennas to get some more range on band 25 and figured they'd need to fill in the coverage around the tower as a result.
  2. lordsutch

    Network Mapping

    If you're looking to try to find tower locations or correlate GCI/PCI information to towers, here's some code I've been working on that processes the data collected by my SignalDetector app, using the LTE Timing Advance information reported in recent Android versions for triangulation. It's not 100% perfect with only a few data points but it can zero in pretty decently with sufficiently-spaced data points; typically it gets within 50 meters or so of Sprint's recorded GPS coordinates of the towers. https://github.com/lordsutch/cellfinder An example of what it does is attached. Note that this is not based on anything except data collected from the phone—it's not using any sponsor data from S4GRU to estimate the tower locations, just signal data collected by me driving on I-16 and around the Savannah area in early November.
  3. Interesting design - from the marketing materials, these units are intended to be attached to overhead cable lines and include a built-in cable modem, or can function as an LTE relay where there's already LTE (presumably also band 41) for backhaul, among other interfaces: http://www.airspan.com/airstrand/.
  4. I was able to get Sprint to send the Airave 3 to my mom's house and hooked it up a week ago. Setup was pretty straightforward once I found a place out of the way where all the cords would reach and I could get a GPS lock with the included puck. (My only peeve: the power cord could stand to be a bit longer.) So far even though she has a pretty cruddy broadband connection (10/1), which I'm sure would disappoint anyone who gets close enough to her house to connect to the band 41 signal, it seems to be working fine for data, voice, and SMS indoors, even on the LAN side of the router (even though she appears to be triple NATed!).
  5. lordsutch

    sprint network 2018 predictions

    RRPP (which SouthernLINC is part of) was originally billed as allowing partners to deploy on Sprint's spectrum outside native coverage, so it's possible they'd do that. If they did that it wouldn't surprise me if they reserved a 1.4x1.4 carrier for their "bulletproof" B2B service though.
  6. lordsutch

    Cheesy ESMR/LTE base station tracker

    I added a new feature to the app: now there's a "Share" button in the action bar to send the log files to another app like Dropbox or Google Drive (or email or whatever - anything that will accept text/csv files). Probably in the next version I'll add more fine-grained control of the logging feature (i.e. the ability to only generate some logs, as requested) and a "clear" button in preferences, so people will need to fool with external storage even less.
  7. lordsutch

    sprint network 2018 predictions

    SouthernLINC has recently posted their LTE coverage map. You'll note the "partner coverage" appears to correspond to Sprint's LTE footprint.
  8. Someone at Sprint apparently knows it's my birthday, because it seems like they flipped a switch today and my phone is suddenly picking up at least two new band 41 sites in the Macon and Warner Robins area (one in each); there's probably more but I haven't noticed any obvious tower work so I had no reason to look to see if things were moving or not until today. Maybe I'll have time tomorrow afternoon to go poking around.
  9. lordsutch

    sprint network 2018 predictions

    2018 should be the year that SouthernLINC finally launches its band 26 LTE network (I've already seen it show up when searching for networks with a UK SIM in my phone), which should help Sprint's roaming footprint in the southeast quite a bit once VoLTE and/or CallingPlus is live on most devices.
  10. Does anyone know if the Airave 3 copes with Double NAT situations OK? My mom's house is in a bit of a coverage black hole for Sprint, about equidistant from 3 macro sites and in a bit of a hollow, so the Airave 3 would make sense there. But her broadband connection & cable is provided by the neighborhood association and there's at least two layers of NAT involved - her cable modem gets a single 10.x.y.z address on the WAN port and then of course within the house there's a router with a more typical 192.168.y.z setup on the LAN side. I assume there's no more translation on the way up based on traceroute, but who knows? Any experience with the Airave in this situation? She's currently not using a smartphone so the Magic Box wouldn't help her yet - it'd help me when I visit though, and I might eventually get her onto a smartphone at some point. But for now the Airave 3 seems to be the way to go if it'll work.
  11. lordsutch

    Network Vision/LTE - Memphis Market

    I had no more luck on the way back; my Pixel 2 XL wouldn't even connect to 1X or 3G on CSpire. My Nexus 6 on Project Fi wouldn't connect either when I forced it to connect via CDMA/LTE using the *#*#FISPR#*#* dialer code.
  12. lordsutch

    Network Vision/LTE - Memphis Market

    Now I've had a chance to look through the log, it was definitely not AT&T; it was CSpire (311-230) MFBI (band 2/25), EARFCN 8440 (1970 MHz downlink). There was also quite a bit of band 12, EARFCN 5145; while the phone would register on the network I never got a successful data session and actually had to reboot to get it to connect again to LTE when I got into Sprint coverage.
  13. lordsutch

    Network Vision/LTE - Memphis Market

    Something odd with my Pixel 2 XL yesterday: in Itawamba County (on the border with AL east of Tupelo) my phone would connect to CSpire's LTE network but I couldn't get any data session to work ('x' on the signal strength indicator) - although I had no trouble roaming on AT&T LTE in NW Alabama earlier. But perhaps more interesting is that at least some of the towers were broadcasting on Band 25, which is the first evidence I've seen of a RRPP partner deploying on Sprint's spectrum. I also saw some Band 12 (presumably the 700 A block spectrum CSpire bought). I haven't seen any evidence of Sprint deployment on Band 12 in Memphis so far but I'll keep an eye out.
  14. Spent the weekend in Savannah and spotted some band 41 coverage downtown along Bay Street. However, dropped to 3G around the Savannah Mall & Armstrong - that whole area seems like a coverage black hole for some reason, even though everywhere else I really didn't have any complaints.
  15. lordsutch

    Cheesy ESMR/LTE base station tracker

    Try updating to the latest APK (I've made some tweaks recently to fix issues with Oreo I've experienced with my Pixel 2 XL). You may also need to adjust the notification channel settings for the app - the priority might be set too low.