Once you have selected option, wait about one minute and then reboot your phone. Please follow the guide below.įor Samsung Galaxy S3, wait about 30 seconds and tap the 'Menu' button and select 'Back > NW Lock NV Data INITIALLIZ'. In the Debug menu, please tap 'PHONE CONTROL > NETWORK LOCK > Perso SHA256 Off'.Īfter you finish the above operation, here are some difference between S3 and S4. You can open the Debug menu by selecting 'DEBUG SCREEN'. Step 2 Open the Debug Menu and Choose the Option But please do not change other settings on this page, or it may lead to the result that your device is non-working.

In the ServiceMode menu, please tap 'UMTS'.

When you finish the entering, it can open the Service menu automatically. Step 1 Enter Code in the Dialer and Select UMTS CDMA phones, such as Sprint and Verizon phones are not available. For Samsung Galaxy S4, only T-Mobile and AT&T phones can work with this way. For Samsung Galaxy S3, please make sure your Android version is Android 4.1.1 or later or it can't work well with this method.Ģ. And the steps of Galaxy S4 are a little bit complex than S3.ġ. Take Samsung Galaxy S3 and S4 as example, we can unlock SIM cards manually. Unlock SIM Card with Android Data Recovery Now I want to show you how to unlock SIM card in two different ways. SIM locking can prevent users to use other SIM cards on the specific phone but only the one that has signed a contract. So the network providers come up with SIM card locking. When the users get the discounted phone, they may abandon their SIM with the network contract and turn to another company for the network. In normal condition, the network providers try to earn a profit by selling user a discounted phone with the network contract, which is sustained for about two or three years.

Samsung s4 sim card hack