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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Samsung > QUALCOMM Models (3G)

QUALCOMM Models (3G) SGH-Z105x, SGH-Z107x, Z110, Z130, Z140, Z300, Z320i, Z500, Z510, ZM60, ZV10, ZV30, ZX10.

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Old 02-26-2013, 12:56   #1 (permalink)
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help me unlock galaxy s3 SCL21

Hello , i have model galaxy s3 SCL21 made in korea , help me unlock plz

I have z3x box , octopus box

thank all
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Old 02-26-2013, 13:47   #2 (permalink)
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Till now No Box Support This for Unlock ,

Batter ask in Gsm services Boxes Area , If any team have develop any thing will Contact u for Beta test ,
or Move to Buy operator Code ,
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Old 04-26-2014, 11:22   #3 (permalink)
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Hello , i have model galaxy s3 SCL21 made in korea , help me unlock plz
i have octupus, z3x,spt butt no one have support
please help..,
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Old 12-27-2014, 10:37   #4 (permalink)
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It goes without saying that you full responsibility should you try this. There will be no hand holding. Use your common sense, go slow, make your own notes.

If you are on firmware 4.1.2, the following procedure will open the Service Menu for you.

1. Dial *#9090#
2. Press Menu > Back
3. Press Menu > Key Input then type Q (yes that is correct) and hit OK
4. Press Menu > Key Input then type 0000 (that is four zeroes) and hit OK. Wait a couple of seconds and the Service Menu (DIAG CONFIG) will open up.

Unlocking steps are as follows.

1. Press UMTS > DEBUG SCREEN > PHONE CONTROL > NETWORK LOCK > PERSO SHA256 OFF. Wait 30 sec, then hit Menu > Back until you see NETWORK CONTROL at the bottom.
2. Press NETWORK CONTROL > GCF > GSM/(E)GPRS/WCDMA REL5. Then hit Menu > Back until you see BAND SELECTION.
3. Press BAND SELECTION > GSM > GSM ALL
4. Turn off your phone, put in a new SIM card and see if it worked.

If it doesn't work. Then repeat steps 2 & 3 above but change the selection to SETTING CANCELLATION and DEFAULT BAND PREFERENCE respectively. Turn off the phone, replace your original SIM card, boot and your LTE should be restored.

It should be noted that even if this does work, it will only allow you to use 3G since this phone only supports LTE BANDS 11 and 18. YMMV.
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Old 04-13-2015, 17:25   #5 (permalink)
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I try ... its working good ..how unbelive able ...Thanks bros
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Old 04-13-2015, 17:26   #6 (permalink)
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no need any box just follow the upper step and get unlock and enjoy..
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