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How to Unlock Samsung Galaxy S3 and Used in Other Countries.

Unlock Samsung Galaxy S3. On some Samsung Galaxy smartphones, such as the Galaxy Note II, Note 3, S3 and S4, is designed to function using only the SIM card that exist in a particular country or region, region information is usually contained in the carton pack when purchase it. Of course it will certainly be a problem if you have a hobby or job that requires you go to a any country using your Samsung Galaxy S3 smartphone. Because you can not use a local SIM Card to make a call or any other communications.

The reasons is, when the Samsung Galaxy S3 device is activated using a SIM card from a different region or country, the device is automatically locked and you must contact customer service so that your smartphone can use a local SIM card. For thus, we have some solution below to Unlock your SIM Card on Samsung Galaxy S3 when you are stay in another country.

There are two types of lock on android smartphones. Region lock and Network lock. on this guide we will show you to unlock your Samsung Galaxy S3 when locked by region lock.

1. First Method. Unlock Via Samsung Customer Service .

If you have problem to unlock your Samsung Galaxy S3, you can try use this method to Unlock it by contact Samsung customer service. You can see an information on how to contact Customer Service at here. On this site you can use three option to contact Samsung customer services.

Using Live chat
By Email
or By Call (you can use this service on working hours, 24 hours from Monday - Sunday. except on national holidays)

2. Second Method. Unlock Via Mobile Network Carrier.

You can use this second alternative method to unlock your Samsung Galaxy S3. on this method you can contact your mobile network carrier to request unlock code. each operator has different requirements to provide an unlock code. Usually you have to pay the full amount of your mobile phone first, and you have to subscribe to at least three months. You should explain that you will be traveling abroad using your Samsung Galaxy S3 and need to buy a SIM card at your destination.

If your request is approved, you will receive unlock code from network carrier. Now what should you do ?

Switch off your Samsung Galaxy S3
Now, insert your new SIM card
Then, Turn on your Samsung Galaxy S3 again. When the phone tries to connect to a new network, you will be prompted to enter an unlock code.
Now, Enter the unlock code. Make sure you enter the right code. If you enter the wrong code repeatedly, the phone will be locked and you have to open it through your operator. Once the code is entered, you will be connected to the new network.
unlock code samsung galaxy s3
If this method does not work, you can try the other method.

3. Third Method. unlock via a paid site.

On this site you can request an unlock code. of course, is not free. to get the unlock code you have to pay a 30-50 dollars. These sites are widely available on the internet, you can choose by yourself a website that provide unlock code. for example you can use www.masterunlockcode.com.

Get your IMEI number on your Samsung Galaxy S3 smartphone device. to do this, you must dial *#06# on dial pad.
IMEI number - *#06#
Now getting your unlock code.

Visit this website https://www.masterunlockcode.com/
masterunlockcode
then type Samsung Galaxy S3 on search bar.
Then you must see this picture on your screen.
unlock code samsung galaxy s3
Now select your Original Network Provider (Phone is from)
select your Original Network Provider
Then enter your IMEI.and click Add to chart
IMEI.and click Add to chart
On the shopping chart, now click Checkout
checkout unlock code
Now fill all form at wellcome sign in. just select Returning customer or New customer.
wellcome sign in
Then you will see payment information.
Now, choose a way to pay.
Once payment is done, you can Log in to your Gmail account to check your code at inbox.

Inputting Unlock Code

switch off your Samsung Galaxy S3
Insert SIM Card
and then turn on again
when ready now input your Unlock code that you get in your email.
input unlock code
then tap unlock button
Once it's success you will see a notifications SIM Network unlock successfull
Finish

Now you have successfully unlock SIM Card on Android Samsung Galaxy S3 Smartphone.

4. Fourth Method : Using Manual Unlock.

If all methods described above are not working on your Samsung Galaxy S3, Now, you can try using the manual unlock.

Make sure your Samsung Galaxy S3 is locked. to check it you can Insert a SIM card from another network carrier to make sure your phone is locked. Most of the Galaxy S3 has a locked by default.
Update your phone firmware. Your Samsung Galaxy S3 must be running at least Android 4.1.1 or newer to perform this method.
To check your android version installed on your phone, you can go to settings -> scroll down to About device.
android version
To update your phone, Go to Settings, and scroll down to About Device. In the next menu, select System Updates> Check for Updates.
You can updates via Wifi only because your SIM is not yet connected to the mobile network carrier.
Make sure your Samsung Galaxy S3 phone is GSM phones.
This method is not guaranteed to work in all the Samsung Galaxy S3, but you can try without any risk.

Open dial pad
Then dial *#197328640#
On the main menu, select UMTS
umts - samsung galaxy s3
Then tap Debug Screen
debug screen - samsung galaxy s3
On the debug screen select Phone control
Then under phone control menu, select Network Lock
network lock - samsung galaxy s3
On the next screen select PERSO SHA256 OFF
Then tap menu button, and tap back. You will return to the NETWORK LOCK menu.
On this menu, you can select NW LOCK NV DATA INITIALLIZ. you must wait about a minute after selecting the menu.
NW LOCK NV DATA INITIALLIZ
After waiting about a minute, restart / reboot your phone. on this screen you will not receive confirmation of whether the process is working.
reboot samsung galaxy s3
Finally, Insert the new SIM Card which not accepted.
Then power on the Samsung Galaxy S3.
If your phone did not ask for Unlock Code, it is permanently unlocked to use with any GSM carrier.
Finish. Enjoy it.

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