So, your device has just released Android version with new security type,
to unlock you have to download supported firmware below and flash it with Odin flasher.
If you can't see your model in the list below, ask a question support@unlockclient.co
You will lose any user stored data(contacts, text messages, etc)

I747UCDLK3.zip   for Galaxy 3 AT&T
I747MVLDLK4.zip  for Galaxy 3 Bell
I747MVLDLK4.zip  for Galaxy 3 Sasktel
I747MVLDLK4.zip  for Galaxy 3 Fido
I747MVLDLK4.zip  for Galaxy 3 Koodo
I747MVLDLK4.zip  for Galaxy 3 Rogers
I747MVLDLK4.zip  for Galaxy 3 Telus
T999UVDLJA.zip   for Galaxy 3
T-Mobile
T999LUVAMB7.zip  for Galaxy 3 T-Mobile LTE
T999VVLDLL1.zip  for Galaxy 3 Wind
T999VVLDLL1.zip  for Galaxy 3 Mobilicity
T999VVLDLL1.zip  for Galaxy 3 Videotron

M919UVUAMDL.zip  for Galaxy 4 T-Mobile
M919VVLUAMDJ.zip for Galaxy 4 Wind
M919VVLUAMDJ.zip for Galaxy 4 Mobilicity
M919VVLUAMDJ.zip for Galaxy 4 Videotron
M919VVLUAMDJ.zip for Galaxy 4 EastLink
I337UCUAMDL.zip  for Galaxy 4 AT&T
I337MVLUAMDJ.zip for Galaxy 4 Bell
I337MVLUAMDJ.zip for Galaxy 4 Sasktel
I337MVLUAMDJ.zip for Galaxy 4 Fido
I337MVLUAMDJ.zip for Galaxy 4 Koodo
I337MVLUAMDJ.zip for Galaxy 4 Rogers
I337MVLUAMDJ.zip for Galaxy 4 Telus
I337MVLUAMDJ.zip for Galaxy 4 Virgin
I337MVLUAMDJ.zip for Galaxy 4 Pcm
I337MVLUAMDJ.zip for Galaxy 4 Puerto Rico
I337MVLUAMDJ.zip for Galaxy 4 Sol
I337MVLUAMDJ.zip for Galaxy 4 Telcel
SC04EOMUAMDI.zip for Galaxy 4 Docomo
I9305XXBLL5.zip  for Galaxy 4 EE UK
N7105XXDMA8.zip  for Galaxy 4 Singtel

odin307.zip      rom flasher


Flashing how-to

1.Put phone into download mode screen for Odin flasher.
  Turn it off, once completely shut down  hold down the 'HOME' + 'VOLUME DOWN' buttons and
  press the 'POWER' button for about 2 seconds until a WARNING! Screen appears.
  Press the 'VOLUME UP' button to continue or enter Download Mode.
2.Connect the phone to PC via USB. Then make sure you can see as phone "Added" in Odin log
  box or highlight the COM:ID once the device is detected
3.In Odin window, DO Not tick 'RE-Partition' only Tick 'Auto Reboot' and 'F. Reset Time'.
4.Now load the tar file e.g "yourphone.tar.md5"  in Odin PDA button.
5.Click on "Start" to flash the supported firmware.
6.Wait until the flashing successfully finishes, you'll just see a word 'PASS' in odin.
7.Phone can hangs at Samsung afterwards so do hard reset after removing and inserting
  battery 'HOME' + 'VOLUME UP' + 'POWER' scroll to "wipe data / factory reset" with volume
  and confirm with power key.
8.Run UnlockClient.exe and click search.