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  1. #1
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    Questions about firmware and regions

    Hello everyone and first of all congratulations for this great forum.

    I am new user and even though I read many, many threads in this forum, and others across the internet, I still don’t understand some terms regarding my smartphone.

    I have model A510F and here are my current firmware:
    AP:A510FXXU4BQC1
    CP:A510FXXU4BQC1
    CSC:A510FOXA4BQC1

    1.I understand that CP is modem firmware, so, what is the difference between PDA(AP) and CSC firmware? Why do we need CSC since AP decides firmware updates? Are the country codes 2 digit or 3 digit? What information do I get from these 3 codes? (XXU vs OXA?)

    2.Using the app Phone Info I found that product code is SM2A510FZDAXEO. I believe XEO is from Poland which is true, because even though I bought the phone here in Greece, the seller imported it from Poland. So, overall, now we have XXU / OXA / ZDA. How are these connected?

    3.Is it generally a good idea to change the CSC to EUR, which is Greece, since I live here or shall I leave it as it is? Do I benefit from something?

    4. Both EUR and XEO are unbranded codes. I see that in EUR latest android is version 7 but for XEO is 6. So….what makes it such difference? I mean, since they are not carrier dependent who is stalling/deciding the upgrade to v.7 in Poland?

    I am really sorry if those questions sound noob to you but I would really appreciate it if someone had the time to reply and explain or post a link for me to further study.

    Thank you in advance.

  2. #2
    Senior Member
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    Hello chapapak, and thank you for your kind words.
    We are proud of our forum and hope you will enjoy using it.

    Now your questions:
    1. AP/PDA is the android version
    The last 3 digits at the end are the most interesting (possibly!!)
    In your firmware your AP last 3 digits are QC1
    Q is the year = 2017 (2016 = P, and 2018 = R)
    C is the month = March
    1 = Revisions during the month, in this case no revisions.

    CSC = Customer Software Customisation
    This part of the firmware makes sure that the opening language is correct, and other country(or network) specific information is installed.

    The country/network codes are 3 digits.
    They are simply representative, similar to the country code sticker you may put on your car.

    2. You are correct in that XEO = Poland
    Poland firmware is part of a multi country/multi csc firmware.
    The 'family' code for the firmware is OXA and includes BTU CPW DBT ITV KOR NEE XEF XEO XEU

    XXU is a region code
    In this case it is Europe.


    ZDA is model information.
    ZDA = Black

    3. There is no reason to change your CSC code to the country you are in.
    In fact you cannot change to EUR because it is part of another multi csc family.
    EUR is part of
    OXX multi CSC ( BGL ERO ETL EUR ORX ROM SEB SEE SIO TPH TWO XEF XEH XEO)
    If you install EUR firmware you will get the default CSC in the firmware.
    I understand that the default csc is XEO.

    4. Which phones are updated and when is purely a decision for Samsung.

  3. #3
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    Thank you for your explanations, things are much more clear for me now.

    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    Hello chapapak, and thank you for your kind words.
    We are proud of our forum and hope you will enjoy using it.

    Now your questions:
    1. AP/PDA is the android version
    The last 3 digits at the end are the most interesting (possibly!!)
    In your firmware your AP last 3 digits are QC1
    Q is the year = 2017 (2016 = P, and 2018 = R)
    C is the month = March
    1 = Revisions during the month, in this case no revisions.
    Great! This explanation is exactly what I was looking for!
    What about 4B? Does this refer to the android version current installed? (Android 6)
    Because in this link:
    [ Login above or register to see download links. ]
    I noticed that the first firmware installed had 1A,2A,2B,3B and now is 4B


    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    CSC = Customer Software Customisation
    This part of the firmware makes sure that the opening language is correct, and other country(or network) specific information is installed.

    The country/network codes are 3 digits.
    They are simply representative, similar to the country code sticker you may put on your car.

    2. You are correct in that XEO = Poland
    Poland firmware is part of a multi country/multi csc firmware.
    The 'family' code for the firmware is OXA and includes BTU CPW DBT ITV KOR NEE XEF XEO XEU

    XXU is a region code
    In this case it is Europe.
    Just for information, what impact will it have if I flash firmware (using Odin) from different family code? Or even a family code from different continent?
    eg. In this link:
    [ Login above or register to see download links. ]
    which is Iraq, PDA:A510FXXU4CQE7, CSC:A510FOJV4CQDL

    Since we can use our cellphone all over the world, does it have any impact if I install a version from another continent? Or does it also change the baseband firmware? Do the same model cellphone have different hardware in different countries so this will make my cellphone unusable?

    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    ZDA is model information.
    ZDA = Black
    It refers to model color? Because my A510F is Gold.

    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    3. There is no reason to change your CSC code to the country you are in.
    In fact you cannot change to EUR because it is part of another multi csc family.
    EUR is part of OXX multi CSC ( BGL ERO ETL EUR ORX ROM SEB SEE SIO TPH TWO XEF XEH XEO)
    If you install EUR firmware you will get the default CSC in the firmware.
    I understand that the default csc is XEO.

    4. Which phones are updated and when is purely a decision for Samsung.
    I am sorry but I did not understand what you mean by "default". You mean the CSC my phone originally had when I bought or the CSC that it gets when I flash a family region CSC?

    Thank you in advance for your time and effort

  4. #4
    Senior Member
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    I am not aware of the link to the 1A,2A,2B,3B and now is 4B other than alpha/numerical order.

    You can install any A510F firmware on your phone, but there is no real advantage in changing unless the new firmware is a new android version (rather than an update)

    You are correct the ZDA is Gold.

    Default is the csc that you will receive if coming to the firmware from another csc firmware family.



  5. #5
    SamMobile Supporter
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    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    2. You are correct in that XEO = Poland
    Poland firmware is part of a multi country/multi csc firmware.
    The 'family' code for the firmware is OXA and includes BTU CPW DBT ITV KOR NEE XEF XEO XEU

    XXU is a region code
    In this case it is Europe.
    Ok. XXU is Europe. But what mean XXS ?

  6. #6
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    Quote Originally Posted by locarno [ Login above or register to see download links. ]
    Ok. XXU is Europe. But what mean XXS ?
    Looks like the Middle East if you look at the firmware.

    Samsung are changing this convention.
    If you look at S8 firmware it all has XXU.

  7. #7
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    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    Hello chapapak, and thank you for your kind words.
    We are proud of our forum and hope you will enjoy using it.

    Now your questions:
    1. AP/PDA is the android version
    The last 3 digits at the end are the most interesting (possibly!!)
    In your firmware your AP last 3 digits are QC1
    Q is the year = 2017 (2016 = P, and 2018 = R)
    C is the month = March
    1 = Revisions during the month, in this case no revisions.

    CSC = Customer Software Customisation
    This part of the firmware makes sure that the opening language is correct, and other country(or network) specific information is installed.

    The country/network codes are 3 digits.
    They are simply representative, similar to the country code sticker you may put on your car.

    2. You are correct in that XEO = Poland
    Poland firmware is part of a multi country/multi csc firmware.
    The 'family' code for the firmware is OXA and includes BTU CPW DBT ITV KOR NEE XEF XEO XEU

    XXU is a region code
    In this case it is Europe.


    ZDA is model information.
    ZDA = Black

    3. There is no reason to change your CSC code to the country you are in.
    In fact you cannot change to EUR because it is part of another multi csc family.
    EUR is part of
    OXX multi CSC ( BGL ERO ETL EUR ORX ROM SEB SEE SIO TPH TWO XEF XEH XEO)
    If you install EUR firmware you will get the default CSC in the firmware.
    I understand that the default csc is XEO.

    4. Which phones are updated and when is purely a decision for Samsung.
    Hi, can you give me stock 4 files, which can be repaired when the device fails to work properly

    etc,,pit ,boatloader, báseband

  8. #8
    Junior Member
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    Feb 2017
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    Good evening,

    You said in your previous post that
    3. There is no reason to change your CSC code to the country you are in.
    In fact you cannot change to EUR because it is part of another multi csc family.
    EUR is part of OXX multi CSC ( BGL ERO ETL EUR ORX ROM SEB SEE SIO TPH TWO XEF XEH XEO)
    If you install EUR firmware you will get the default CSC in the firmware.
    I understand that the default csc is XEO.
    But also

    2. You are correct in that XEO = Poland
    Poland firmware is part of a multi country/multi csc firmware.
    The 'family' code for the firmware is OXA and includes BTU CPW DBT ITV KOR NEE XEF XEO XEU
    so OXA appears in both?
    Actually is there any official list posted somewhere so that I study in depth?

    So, let me ask you something please:

    1.If my CSC code is part of a multi CSC code (lets call it "A") and I change the firmware in another family CSC code ("B"), then my phone changes the CSC to default code of family "B". Is my statement correct?

    2.If I do what I say in No1, and I want return back to the firmware of region "A", and lets suppore that my original CSC code is not the default in the region "A", then again, my CSC will be the default of "A". In that case if there any way to change to what CSC I want, ie. the original one?

    3.Will all the above affect the warranty, IMEI, Knox even if my cellphone is not rooted? Will I need to check if any possible downgrade is not allowed?

    Thank you and have a nice day

  9. #9
    Junior Member
    Join Date
    Feb 2017
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    5
    I'm sorry for posting offtopic, but I had made a reply to your post a couple of days ago and still can't see it. I saw a message that it needed moderation approval, is everything ok with my post regarding rules?

  10. #10
    Senior Member
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    1. That is correct.
    2. That is correct again.
    Returning to the original firmware you should use SmartSwitch or Kies
    [ Login above or register to see download links. ]

    [ Login above or register to see download links. ]

    3. Changing the CSC voids your warranty
    IMEI and Knox should not be changed by installing the correct stock firmware.

    Check the PDA version on your phone and the PDA version of the firmware you want to install.
    If the same or newer then the firmware will install.

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