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Thread: AT&T 700 MHz network deployment as Band 12 using MFBI

  1. #31
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    Quote Originally Posted by 3DThrillSeek View Post
    The network code is 310 so it's definitely on AT&T'S network.


    http://www.attpublicpolicy.com/fcc/a...-700-mhz-band/

    310-XXX means it is a US network. Replace XXX with the network code. For At&t it is 410.

  2. #32
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    Band 12 on AT&T through MFBI is active inside Camp Pendleton, CA.
    It looks like even the base itself was covered well by AT&T.




    It looks like Band 12 has made it way all the way to the border with Mexico in San Yisdro, CA
    Last edited by i0wnj00; 05-19-2015 at 01:33 PM. Reason: Updated to show Band 12 in San Yisdro.

  3. #33
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    Band 12 is active in Lansing, MI! I could tell because my MetroPCS phone only has B12 not B17.

    I could tell it was AT&T because BW was 10 Mhz whereas Tmo has 5. I roamed onto it inside a building where Tmo doesn't have B12 (they do in surrounding buildings, rollout is underway here). SignalCheckPro has not updated their app for AT&T MBFI yet since it shows B17 in it.

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  4. #34
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    Band 12 through AT&T MFBI is active up here in Mendocino County in NW CA as well. So, we have Band 12 from three carriers in our area, T-Mobile, U.S. Cellular and AT&T.

    Sent from my Nexus 6 using Tapatalk

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    Is MFBI pretty much universal across AT&T's Band 17 LTE network by now? Are Band 12 devices now compatible nationwide with AT&T's Band 17 LTE network or is MFBI still an isolated exception?

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    My ears must have been tingling, some news has just come out:

    http://www.wirelessweek.com/news/201...4&location=top

    AT&T said that the feature has been fully deployed on its macro-cell network.

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    Quote Originally Posted by GSMinCT View Post
    Exactly. It's picking up B or C. Nothing new here really. Hopefully B17 will be driven out of existence, as it was stupid and shouldn't have existed in the first place, since B12 covers everything. The same is true for B25(???) which is a superset of B2.
    Correction, AT&T does not have license for Band 12. They are not legally broadcasting Band 12 (A,B,C), only through MFBI (B,C, blocks). It is like renaming their band 17 as band 12. Devices that only supports band 12 can see band 17 in AT&T but it is still Band 17. The only reason AT&T agrees to interoperate the signal is to have roaming agreement, which FCC forces at&t to do so. Now AT&T selling Band 12 devices only because it can see band 17 perfectly and can roam to other networks as well. But AT&T only has license spectrum to broadcast Band 17.

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    Quote Originally Posted by E_tron View Post
    Is MFBI pretty much universal across AT&T's Band 17 LTE network by now? Are Band 12 devices now compatible nationwide with AT&T's Band 17 LTE network or is MFBI still an isolated exception?
    I believe Band 12 in at&t is deployed in most areas but not all over at&t. AT&T only has license to broadcast Band 17 and can interoperate that through MFBI software manipulation to band 12.

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    Quote Originally Posted by Wide_opeN View Post
    So what 700 MHz band is it that AT&T uses currently, band 17!?

    Also, why wasn't band 12 used from the start!?

    Too, what band is Verizon 700 on!? I know what T-Mobile bought from them was band 12.

    I know I'm all over the place, but I thought Sprint was the only one that was going to be using FDD-LTE.

    Just trying to self-educate, so any responses are appreciated!!!


    Thank You John Legere!!!
    AT&T is still broadcasting Band 17 and will be but in most areas they interoperate (MFBI) Band 17 so Band 12 can see them.

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    Quote Originally Posted by paperwastage View Post
    it's physically compatible (i.e. the AT&T band 17 phone will be able to receive and transmit the data sent on those B & C blocks)

    but for it to work, the network needs to broadcast itself as band 17 (and band 12, aka MFBI)
    (the AT&T phone only looks out for signals identifying network as band 17)

    so there are three cases for a at&t band 17 phone

    A) Network only has block A (aka T-mobile). Network broadcasts itself as band 12 only, AT&T band 17 phone CANNOT use it
    B) Network has block A and B (and C). Network broadcasts itself as band 12(A&B&C) AND band 17(B&C) via MFBI. AT&T Band 17 phone can use the B&C portion (band 17), t-mobile phone can use all
    C) Network only has blocks B(and C, aka AT&T's LTE network right now). Network broadcasts itself as band 12 AND band 17. AT&T Band 17 phone can use B&C portion, t-mobile band 12 phones can use B&C portion.
    This is very precise it is like your wireless router if you rename the router your phone will no longer be connected. So means MFBI has to broadcast 12/17 together so devices can connect at the same time. Even though Band 17 covers B,C blocks if the network not broadcasting Band 17 MFBI it will not connect.

  11. #41
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    Here are some of the AT&T UARFCN's broadcast in most areas:


    2200 = 10MHz Band 4
    2175 = 5MHz Band 4
    675 = 15MHz Band 2
    800 = 10Mhz Band 2
    9890 = 10MHz Band 30
    5780= 10MHz Band 17
    5760 = 5MHz Band 17 lower B block
    5815 = 5MHz Band 17 lower C block 700MHz
    5110 = 10MHz Band 12 ( 5110(12) and 5780(17) broadcast on exact same frequencies this is MFBI 5110 for B12 Lower B Block) I dont know about lower C block on B17 if they have MFBI active

    T-mobile Band 12 broadcast in 5010 block A and 5035 block B/C i believe.

    Figuring UARFCN what band it's on go visit www.cellmapper.net/arfcn

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    Quote Originally Posted by skyethur View Post
    5110 = 10MHz Band 12 ( 5110(12) and 5780(17) broadcast on exact same frequencies this is MFBI 5110 for B12 Lower B Block) I dont know about lower C block on B17 if they have MFBI active
    If you're broadcasting 10 MHz band 17 wouldn't that necessarily include both the B and C blocks?
    Donald Newcomb

  13. #43
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    Quote Originally Posted by DRNewcomb View Post
    If you're broadcasting 10 MHz band 17 wouldn't that necessarily include both the B and C blocks?
    I dont think so look at my UARFCN's lists Band 17 has 5760, 5780, 5815 they are in different frequencies but the same band name some tower broadcast 5760 and some 5780 but i am sure they also have MFBI in those towers.


    2200 = 10MHz Band 4
    2175 = 5MHz Band 4
    675 = 15MHz Band 2
    800 = 10Mhz Band 2
    9890 = 10MHz Band 30
    5780= 10MHz Band 17
    5760 = 5MHz Band 17 lower B block
    5815 = 5MHz Band 17 lower C block 700MHz
    5110 = 10MHz Band 12 ( 5110(12) and 5780(17) broadcast on exact same frequencies this is MFBI 5110 for B12 Lower B Block) I dont know about lower C block on B17 if they have MFBI active

    T-mobile Band 12 broadcast in 5010 block A and 5035 block B/C i believe.

    Figuring UARFCN what band it's on go visit www.cellmapper.net/arfcn

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    Quote Originally Posted by skyethur View Post
    I dont think so look at my UARFCN's lists Band 17 has 5760, 5780, 5815 they are in different frequencies but the same band name some tower broadcast 5760 and some 5780 but i am sure they also have MFBI in those towers.


    2200 = 10MHz Band 4
    2175 = 5MHz Band 4
    675 = 15MHz Band 2
    800 = 10Mhz Band 2
    9890 = 10MHz Band 30
    5780= 10MHz Band 17
    5760 = 5MHz Band 17 lower B block
    5815 = 5MHz Band 17 lower C block 700MHz
    5110 = 10MHz Band 12 ( 5110(12) and 5780(17) broadcast on exact same frequencies this is MFBI 5110 for B12 Lower B Block) I dont know about lower C block on B17 if they have MFBI active

    T-mobile Band 12 broadcast in 5010 block A and 5035 block B/C i believe.

    Figuring UARFCN what band it's on go visit www.cellmapper.net/arfcn
    My 10 MHz B4 EARFCN is 2100 in my market. T-Mobile's is 2200.

    My B30 EARFCN is 9820.

    Chicago, IL
    2+46+46+46+4

  15. #45
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    That should get interesting here, we have AT&T broadcasting Band 17, and both U.S. Cellular and T-Mobile broadcasting Band 12.

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