1. Headcase_Fargone's Avatar
    Hi all,

    I just picked up a refurbished AT&T Galaxy S3 (i747) and it appears to have the T-Mobile (T999) bootloader for some reason.

    Here's what I've found model and version-wise...

    System settings - About device:
    Model number SGH-I747
    Android version 4.1.2 (stock Touchwiz)
    Build number I747ZSEMC1

    Info app from Play store:
    Boot loader version T999UVDMD5
    Finger print samsung/d2vl/d2can:4.1.1/JRO03l/I747ZSEMC:user/release-keys
    Product d2vl
    Model SGH-I747

    Download Mode shows T999 bootloader.

    Putting a T-Mobile sim in registers on the network and for some reason I get H+, which I didn't think was possible with the I747 AT&T model. Don't have an AT&T sim to test with at the moment.

    I've tried flashing the I747 4.1.2 bootloader but I get different error messages depending on which recovery I use to flash it.

    Stock recovery:

    Verifying update package...
    E:signature verification failed
    Installation aborted


    E:Error in (file path and name)
    (Status 7)
    Installation aborted.


    E:Error executing updater binary in zip (file path and name)
    Updating partition details...

    My primary concern right now is how can I fix this bootloader issue so I can get a more recent rom like AOKP 4.4 on it? Any suggestions?
    03-07-2014 02:22 PM
  2. srkmagnus's Avatar
    The bootloader is something that needs to be flashed to the device. I'm pretty sure you can do it with Samsung devices, but risk ending up with a brick if something goes wrong. I would suggest contacting the seller to make sure the device was intended to be an att device. If it was modified then perhaps the seller can point you in the right direction to install the correct bootloader. You'll likely need to visit xda for the bootloader files.

    Sent from my Nexus 5 using AC Forums mobile app
    03-08-2014 09:45 AM
  3. Rukbat's Avatar
    1747 (the first character is the digit "one") is a TMobile device. I747 (the first character is the first personal pronoun, pronounced "eye") is an AT&T device. You may just be misreading the character.
    03-08-2014 06:55 PM
  4. Headcase_Fargone's Avatar
    It's definitely the letter I, I just double checked. Also, it has an AT&T logo on it...
    03-08-2014 06:59 PM
  5. Tyler Cleveland's Avatar
    If the phone has an ATT based custom ROM on it, the build.prop will make it report it being an att device. As long as it works, dont worry. The two phones are almost identical as far as I know besides software, so the bootloaders are probably cross-compatible. At least one way. Check the radio/baseband version and see what that says. T-Mobile model number is sght999 BTW. Also check the boot loader lock status and the system write protection status.
    07-30-2014 12:42 AM

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