[FIX][ROOT] Disable Fast dormancy on sony smarthphones

• Acro S (thanks barmakinfo)
• Ion
• S
• T (thanks icstm)
• TL (thanks bsined)
• TX
• V (thanks carloskar)
• Z1 (thanks danielalarcon)
• Z1 Compact (thanks Gregz78)

1. First of all, you'll need to know your carrier MCC and MNC. You can found these on wikipedia or in your APN settings
2. Navigate and open ./etc/fast-dormancy/fd_custm_conf.txt
3. You'll see two lines ending with MCC and MNC and two zeros
4. Change those zeros with the codes you look earlier and save
5. Reboot and enjoy

munjeni said:

See this -> https://developer.android.com/reference/android/provider/Telephony.Carriers.html
Mnc and mnc have nothing with dormancy! And dormancy can not be disabled trought fd_custm_conf.txt, you guys are in mistake! Maybe I am wrong but I have tried booth ways (including value 1) and still dormancy spaming my logcat booth ways. It looks like it spaming more when zero values changes.

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munjeni said:

See this -> https://developer.android.com/reference/android/provider/Telephony.Carriers.html
Mnc and mnc have nothing with dormancy! And dormancy can not be disabled trought fd_custm_conf.txt, you guys are in mistake! Maybe I am wrong but I have tried booth ways (including value 1) and still dormancy spaming my logcat booth ways. It looks like it spaming more when zero values changes. I will look into smali for that!

Edit:
Found only in /system/bin/fast-dormancy and function is:

Code:

signed int __fastcall sub_2884()
{
  FILE *v0; // r7@1
  unsigned __int8 v1; // zf@4
  char v2; // nf@4
  unsigned __int8 v3; // vf@4
  signed int v4; // r4@4
  signed int v5; // r5@8
  signed int v6; // r4@2
  signed int result; // r0@17
  char v8; // [sp+14h] [bp-7Ch]@1
  int v9; // [sp+64h] [bp-2Ch]@1

  v9 = _stack_chk_guard;
  _android_log_print(3, "fast-dormancy", "%sFUNCTION: fd_utility_read_custm_conf", "[FDM]: ");
  memset(dword_9010, 0, 0x54u);
  memset(&v8, 0, 0x50u);
  v0 = fopen("/etc/fast-dormancy/fd_custm_conf.txt", "r");
  if ( v0 )
  {
    v4 = -1;
    v5 = -1;
    while ( fgets(&v8, 80, v0) )
    {
      _android_log_print(3, "fast-dormancy", "%sCustm config line: %s", "[FDM]: ", &v8);
      if ( strstr(&v8, "fdmDisabledForMCC ") )
      {
        v3 = __OFSUB__(v4, 8);
        v1 = v4 == 8;
        v2 = v4++ - 8 < 0;
        if ( !((unsigned __int8)(v2 ^ v3) | v1) )
        {
          _android_log_print(
            6,
            "fast-dormancy",
            "%sCurrent exclude list index out of upper limit and  mcc is: %d, quit!",
            "[FDM]: ",
            v4);
LABEL_21:
          v6 = -1;
          goto LABEL_16;
        }
        dword_9010[v4] = sub_27C0();
      }
      if ( strstr(&v8, "fdmDisabledForMNC ") )
      {
        ++v5;
        if ( v5 != v4 )
        {
          _android_log_print(6, "fast-dormancy", "%sMNC and MCC need to be configurated in pairs", "[FDM]: ");
          goto LABEL_21;
        }
        dword_9010[v5 + 10] = sub_27C0();
      }
      memset(&v8, 0, 0x50u);
    }
    if ( v5 == v4 )
    {
      dword_9060 = v5 + 1;
      _android_log_print(3, "fast-dormancy", "%sThe availableExcludeNum is %d", "[FDM]: ", v5 + 1);
    }
    v6 = 0;
LABEL_16:
    fclose(v0);
  }
  else
  {
    v6 = -1;
    _android_log_print(6, "fast-dormancy", "%sCould not read the file fd_custm_conf.txt", "[FDM]: ");
  }
  result = v6;
  if ( v9 != _stack_chk_guard )
    _stack_chk_fail(v6);
  return result;
}

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