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Thread: Help: a520f/ds connecting to 3g/4g results in reboot

  1. #1
    Junior Member
    Join Date
    Apr 2018
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    1

    Help: a520f/ds connecting to 3g/4g results in reboot

    Yesterday I woke up to see my phone has no signal on both sims(different carriers)so I unlock the phone and it rebooted into a boot loop until I took simcards out.
    Now I only can have 2g on both sims to function normally or either it reboots or says emergency calls only.
    I can briefly connect to 3g/4g before restart, so I think this isn't a hardware issue.
    I flashed it with latest builds a couple of times and no lock.
    First I'm on latest official build. Not rooted and my phone is a520f/ds uae.
    Apn setting is correct for both sims and switching sims didn't help.
    I took it to a local repair shop and after looking at it and flashing it the technician told me it probably is a band issue.
    please help me.
    What should I do ?
    Can I flash other regions modems?

  2. #2
    Administrator
    Join Date
    Jul 2012
    Posts
    7,794
    Quote Originally Posted by deadfazel [ Login above or register to see download links. ]
    Yesterday I woke up to see my phone has no signal on both sims(different carriers)so I unlock the phone and it rebooted into a boot loop until I took simcards out.
    Now I only can have 2g on both sims to function normally or either it reboots or says emergency calls only.
    I can briefly connect to 3g/4g before restart, so I think this isn't a hardware issue.
    I flashed it with latest builds a couple of times and no lock.
    First I'm on latest official build. Not rooted and my phone is a520f/ds uae.
    Apn setting is correct for both sims and switching sims didn't help.
    I took it to a local repair shop and after looking at it and flashing it the technician told me it probably is a band issue.
    please help me.
    What should I do ?
    Can I flash other regions modems?
    Hi there, good afternoon

    Can't help you in this one: when it worked before...

    Go to an official Samsung Service Center and tell there your problem

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