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Unlock LTE band 800mhZ Sep 13, 2014

  1. teqnix
    Lollipop Sep 15, 2014

    #21

  2. Pekeltje
    Gingerbread Sep 19, 2014

    Pekeltje , Sep 19, 2014 :
    Wich frequenties can WE really get from this?
    Will it allow us to use the 800Mhz ?
     
    #22

  3. BeAlive75
    Community Veteran Sep 19, 2014

    BeAlive75 , Sep 19, 2014 :
    No. The 800Mhz bandwidth will never be "unlocked" it's and hardware issue.
    That's why OnePlus would make an "EU version" with 800Mhz compatibility but they abandoned the idea after a sondage.
     
    #23
    relic242 likes this.

  4. Stefan_O
    Cupcake Nov 15, 2014

    Stefan_O , Nov 15, 2014 :
    Some people on XDA reported that they got LTE band 20 working on their One. Is that possible?
    Here several people said it´s not possible because there is no antenna for it. I looked into the service manual (with full circuit diagram) of the LG Nexus 5, it does not have a separate antenna for LTE band 20, it uses the same antenna as for GSM 850/900. But the signal comes from different outputs on the RF frontend (WTR1650L for low band) and there has to be a antenna switch and some different components because of the slightly lower frequency.
    But the One uses a newer RF frontend, the Qualcomm WTR1625L. This chip supports LTE band 20, unfortunately I could not find a datasheet for that device and don´t know if for example band 17 and 20 share the same pins on the RF frontend. Also I don´t know if there are any bandpass filters between antenna and RF frontend that would prevent band 20 from being useable even though the RF frontend is connected with the antenna for band 20.
    Could somebody clear up what precisely the hardware issue is? Are the persons reporting band 20 works necessarily wrong? Or does band 20 after unlocking for example only works within 100m radius from base station?
     
    #24
    Chugz likes this.

  5. Deactivated User
    Nov 15, 2014

    #25

  6. Stefan_O
    Cupcake Nov 15, 2014

    Stefan_O , Nov 15, 2014 :
    ??
    In thread linked above in a later post there is a guide how to unlock additional LTE bands and some people reported it to work, but not no real evidence is shown.
     
    #26

  7. lojden
    Cupcake Nov 16, 2014

    lojden , Nov 16, 2014 :
    Lte band 20 (800Mhz) does not work.
     
    #27

  8. sjketchen
    Honeycomb Nov 24, 2014

    sjketchen , Nov 24, 2014 :
    There are so many factors when it comes to unlocking usable LTE bands. The hardware issue is going to be present on some bands, but not necessarily the ones you personally would like. I think a lot of people are making assumptions and stating them as fact. I personally am interested in unlocking band 2 as T-Mobile US is converting their 2G Edge network on the 1900 Mhz PCS over to LTE band 2. Also T-Mobile is going to roll out LTE band 12 which I have seen people say is not hardware supported, but the frequencies involved are almost identical to LTE band 17 which is supported. I would say try it for yourself because I think that a lot of people are saying tha certain LTE bands won't work when they have no technical knowledge to back up their claims other than hearsay.
     
    #28

  9. Chugz
    Ice Cream Sandwich Nov 24, 2014

    #29
    Lox_ likes this.

  10. psvobod1
    Cupcake Dec 9, 2014

    psvobod1 , Dec 9, 2014 :
    Try to keep this thread alive.
    #tmobile #CZ #800MHz only H+ with no modification
     
    #30
    SIMHCAS likes this.

  11. xf4d3
    Ice Cream Sandwich Dec 9, 2014

    xf4d3 , Dec 9, 2014 :
    OP states that the OPO lacks the antennas to run this band.
     
    #31
    SIMHCAS likes this.

  12. psvobod1
    Cupcake Dec 9, 2014

    #32

  13. Mohamed Hussein
    Eclair Dec 13, 2014

    #33

  14. joens
    Lollipop Jan 7, 2015

    joens , Jan 7, 2015 :
    What if, IF we added the antenna manually.
    Should be possible!
     
    #34

  15. ecallejas
    Cupcake Jan 8, 2015

    ecallejas , Jan 8, 2015 :

    -----------------------
    Hi! I also need to UNLOCK LTE band 2, I'm from Mexico using Movistar, but LTE isn't working.
     
    #35

  16. PhoenixFeather
    Honeycomb Jan 8, 2015

    #36

  17. Pekeltje
    Gingerbread Jan 8, 2015

    Pekeltje , Jan 8, 2015 :
    Would like this, should it be hard to do?
    What are the risks?
     
    #37

  18. joens
    Lollipop Jan 8, 2015

    joens , Jan 8, 2015 :
    I have no idea.
    Checked it out a bit but didn't find out where the GSM-antenna is mounted.
    The Wifi-antenna was not hard to find but the other antenna must på on the main board or something like that.

    Will continue to dig in this...
     
    #38

  19. joens
    Lollipop Jan 8, 2015

    joens , Jan 8, 2015 :
    We have this amplifier in our phones:

    SKY77629
    4G FEATURES:
    - Optimized for Envelope Tracking system
    - LTE supports output power bandwidth bands 1, 2, 3, 4, 5, 8
    (and sub-bands 9, 10, 18, 19, 20, 26)

    So the Quadcomm chip supports band 20 but the amplifiers do not.
    Question is if the (and sub-bands 9, 10, 18, 19, 20, 26) is just sub bands or they can be activated also

    Datasheet says that it dosn't support band 20 in LTE.
    http://www.skyworksinc.com/Product/1623/Search.aspx#four

    So, if band 20 is to be enabable you have to change this chip and hope it works.
    AND activate the band in Quadcomm devide.
     
    #39
    dreniacdre likes this.

  20. dreniacdre
    KitKat Jan 8, 2015

    dreniacdre , Jan 8, 2015 :
    This is something they should keep in mind when designing the Oneplus Two.
    Still not feel this phone global enough without band 20 support.
     
    #40

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Last replied by joens

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