Redmi 4a Global B20 Version

Discussion in 'Xiaomi Redmi 4 / 4A / Pro / 4X' started by BjornS, Feb 12, 2017.

  1. BjornS

    BjornSMembers

    Feb 12, 2017
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    Hello,
    There is now also a global international version of the Redmi4a with 4G band B20.
    The official global firmware doesn't have the Dutch language, the firmware here does.
    But does this firmware work with the global international version with the B20 band or not? Will it work but with the B20 band disabled?
    If it does not work with the B20 band version, will it be supported soon?

    Thanks for your help
     
  2. Wilderone

    WilderoneMembers

    Dec 1, 2016
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  3. BjornS

    BjornSMembers

    Feb 12, 2017
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    Hi,
    Thanks for your reply.
    I known that there is a global B20 version 4a, but it doesn't support the Dutch language, so I asked here if there would be a xiaomi.eu firmware version for the that B20 version or if the xiaomi.eu firmware version already supports the global B20 hardware.
    Thanks
     
  4. smartchina

    smartchinaMembers

    Mar 10, 2017
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    Hi Guys,
    I'm also looking for some information about the compatibility of the "rolex" Xiami.eu ROM on the Redmi 4A Global which is already available. Would be pretty cool if someone has some further information on that or tried it already on himself.

    Thanks a lot in advance!!
     
  5. great9

    great9Members

    Mar 10, 2017
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    I can't believe that after 4 years of cheap chinese phones flooding the EU market they didn't make phones with the primarily used 4G LTE band 20 in Europe. We got cheated.
     
  6. wamy007

    wamy007Members

    Mar 20, 2017
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    #6wamy007,Mar 20, 2017
    Last edited: Mar 20, 2017
    Need to know the same.
    Is the eu rom for "Rolex" Redmi4a interchangeable with the global version of the redmi4a?
    And will band 20 still works?
    Anybody tested it allready?

    I know that the "land" redmi 3s firmware is interchangeable with the global version of that phone.


    Kind regards
     
  7. josito801

    josito801Members

    Sep 1, 2014
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    I think the B20 band works without enabling anything in Redmi4A international/global with the Xiaomi.eu roms, @ingbrzy can you confirm it? Thank you.
     
  8. Espresso

    EspressoMembers

    Sep 30, 2013
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    #8Espresso,Mar 29, 2017
    Last edited: Mar 31, 2017
    Yes. Time to shine a light in the (buy shop sellers induced) grey area:

    The Global Version was/is primarily intended for the Taiwanese Market.
    (Other markets served are Hong Kong, Singapore, Malaysia and around this region)
    Has a slightly different box (English text and not Chinese) and different product number.
    The ROM is an 'authentic' one from Xiaomi and updated accordingly with most common international languages.

    But since every store starts to mixing up Global and International to boost sales, you need to be very careful with what they sell.

    Rule of thumb: Double check, double check en check; ask a photo of the box...; if in doubt...don't buy!
    • Chinese text = No B20 supported
    • English text = Most probable B20 supported or fake

    The Global version support band B20. Short overview 3G/UMTS & 4G/LTE bands coding:
    • 800 Mhz = B20
    • 850 Mhz = B2
    • 900 Mhz = B8
    • 1800 Mhz = B3
    • 2100 Mhz = B1
    • 2600 Mhz = B7
    P.S. So a Global version (with hardware enabled B20) should work with any 4A rom.

    You cannot software enable B20 if the hardware is not enabled.
    The main difference is that the so-called 'Quallcom frequency chip' installed. Xiaomi pay extra license fees for enabling B20. Same chip, different coding....
    (In other words; the hardware is the same, but one tiny chip is hardcoded to include/release B20. Yes the multiband antenna's are the same and simultaneously used for 2G, 3G and 4G)

    Yep every band they enable cost license fees....thus the limitation for most phones without B20. Just put a surcharge of around €10 for the end-consumer in cost.

    And that's the thought behind it. Why should everybody in the rest of the world pay €10 Euro extra for a frequency B20? The only winner is Qualcomm..... So yes we got cheated...by Qualcomm.

    Edit: Browse throught the different country shops at mi.com and you find out...
    Models currently supported are
     
    josito801 likes this.
  9. josito801

    josito801Members

    Sep 1, 2014
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    Thanks for this fantastic explanation ;)
     
  10. great9

    great9Members

    Mar 10, 2017
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    Well we got cheated by Xiaomi.
    Any chance of getting the phone to a smartphone electronics service shop and getting the frequency enabled? What's the actual chip that has to be replaced? Where can we find the schematics or datasheets? Any additional info you can provide?
     

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