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Thread: J7 duo (chile) doesn't work in Japan

  1. #1
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    Sep 2016
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    J7 duo (chile) doesn't work in Japan

    Hello guys!

    I have a Samsung Galaxy J7 Duo (J720M, bought in Chile), and for study pruposes I am currently living in Japan. I needed a Japanese Phone number, so I made a contract with "UQ mobile", but after I put the SIM card in the phone only the 4G network works. I can't do phone calls or send SMS.

    After going again to the phone company, they said that this is because my model is a "No Japanese Model", so my only option is to buy a new phone here in Japan.

    So my question is, if I flash my phone to another country firmware, could it maybe works with the Japanese SIM?

    I Search for different firmwares for this phone, and the "J720M" model only has latin american countries firmwares, but there is another model (J720F, which has Asian countries like Singapour, Vietnam, indonesia, etc) so,

    1) can I flash my phone with this different firmware (J720F)?

    2) could the Japanese SIM card works in my phone with this different firmware? (Because it is from Asia)

    Best regards!

  2. #2
    Premium Member
    Join Date
    Jul 2012
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    9,604
    Quote Originally Posted by axtrators View Post
    Hello guys!

    I have a Samsung Galaxy J7 Duo (J720M, bought in Chile), and for study pruposes I am currently living in Japan. I needed a Japanese Phone number, so I made a contract with "UQ mobile", but after I put the SIM card in the phone only the 4G network works. I can't do phone calls or send SMS.

    After going again to the phone company, they said that this is because my model is a "No Japanese Model", so my only option is to buy a new phone here in Japan.

    So my question is, if I flash my phone to another country firmware, could it maybe works with the Japanese SIM?

    I Search for different firmwares for this phone, and the "J720M" model only has latin american countries firmwares, but there is another model (J720F, which has Asian countries like Singapour, Vietnam, indonesia, etc) so,

    1) can I flash my phone with this different firmware (J720F)?

    2) could the Japanese SIM card works in my phone with this different firmware? (Because it is from Asia)

    Best regards!
    Hi there

    No: only SM-J720M firmware is suitable for your device.

  3. #3
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