1. Pancake_Thief's Avatar
    I have the GT-I9300, but the area around my house has terrible reception. My roomate has the T-Mobile version of the SIII, I believe it is the T999, and it has wifi calling, which lets him use it even in the basement. Is there a way for me to flash T-Mobile firmware, or somehow add wifi calling onto my GT-I9300? I do not want to use a voip app. My phone works fine outside on T-mobile service, it's just inside the dead zone of my house where it becomes a problem.
    05-08-2014 07:06 PM
  2. mobilecrackers's Avatar
    I have the GT-I9300, but the area around my house has terrible reception. My roomate has the T-Mobile version of the SIII, I believe it is the T999, and it has wifi calling, which lets him use it even in the basement. Is there a way for me to flash T-Mobile firmware, or somehow add wifi calling onto my GT-I9300? I do not want to use a voip app. My phone works fine outside on T-mobile service, it's just inside the dead zone of my house where it becomes a problem.
    to do that, you need to unlock your phone first, then flash the firmware+ pit file using odin
    05-08-2014 10:12 PM
  3. Pancake_Thief's Avatar
    Where would I get the firmware? Can you link me to it?
    05-09-2014 01:18 AM
  4. mobilecrackers's Avatar
    Where would I get the firmware? Can you link me to it?
    you can download the firmware from here
    Firmwares | SamMobile
    Pancake_Thief likes this.
    05-09-2014 01:50 AM
  5. GTWalling's Avatar
    GT-I9300 and the T999 phones are different processors and frame work. The T999 software may brick the phone.
    05-10-2014 11:47 AM

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