How to Unlock a Cell Phone

When buying a phone from a carrier, the device is often locked and can only use that carrier's services. If you want to use another carrier's service, you need to unlock your device. Thus, you can use a SIM from another network carrier.

Jailbreak through carrier

Contact the carrier's customer service hotline. If you meet your carrier's requirements, you can unlock your phone for free.

Ask about unlocking the device. The requirements for unlocking the device are different for each carrier, usually you need to commit to using their service for a period of time (usually 3-6 months), and you have paid the full amount. buy a phone.

You may be charged an early termination fee if your phone purchase is unpaid.

Wait to receive the code. You will be provided with an unlock code over the phone or via email.

Insert the new SIM into the phone. You need to buy a SIM from a new carrier to receive the request to enter the code.

The location of the SIM slot on each device is different, usually the SIM slot is behind the battery or the SIM tray on the side of the phone. You may have to use a paper clip to pull out the SIM tray.

Enter the unlock code. When you power on your phone after inserting a new SIM, you are asked to enter an unlock code. Be sure to enter the correct code because if you enter it incorrectly too many times, your phone may be locked.

Make sure you're within your new carrier's service area when unlocking your device.

Unlock via paid Unlocking service

Rewrite your phone's IMEI number. This is the phone identification number and is used to unlock the device.

On most phone models, you can check the IMEI number by dialing *#06#.

Many phones print the IMEI number on the back or under the battery.

You can find the IMEI number on the device box.

Find services. There are many online companies that sell unlock codes for your phone for a fee. Different services provide unlock codes for different devices.

You should avoid services that help unlock your phone after completing a survey or request. These sites are often phishing to collect your personal information.

Research and choose services. Before paying a fee to a phone unlocking company, research the company thoroughly. Read user reviews and consult opinions on mobile forums. Always be cautious to avoid being scammed, especially when you pay to avoid carrier policies.

Pay for service. Sometimes, you have to wait a few hours to a few days to receive the unlock code. Because this company has to work with the network provider to provide you with the code.

Don't forget to select all the correct device information to receive an unlock code compatible with your phone.

Insert SIM. To enter the unlock code, you need to insert the new carrier's SIM into the device. The SIM slot on each model is in a different location. Usually, you can find the SIM slot below the battery or the SIM tray on the side of the device.

You may have to use a paper clip to pull out the SIM tray.

Insert code. After inserting the new SIM, start the phone. You are asked to enter an unlock code. Enter the code you just received and check to see if there is a connection.

It takes about 1-2 minutes for the phone to connect to the new service. Make sure you are in coverage area.

Unlock Samsung Galaxy 3 and Note 2

Make sure your device is updated. The phone must run Android 4.1.1 or higher to apply this method. You can check your device's Android version by opening Settings, then scrolling down and selecting About Device. You check the version under the Android Version heading.

Update your phone, open Settings and scroll down to About Device. In the next menu, select System Updates and select Check for Updates. Your phone will search for available updates, and if found, it will download and install.

Open the dialing screen. You need to enter the code to open the Services menu. After opening the dial screen, enter the following code: *#197328640#

Select [1] UMTS. After entering the code, your phone will automatically open the ServiceMode menu. At this step, you choose[1] UMTS.

Tap the selection menu on the screen and select. If you press the wrong option, press the Menu button on your phone and select Back.

Open the Debug menu. In the UTMS menu, select [1] DEBUG SCREEN. In the Debug menu, select [8] PHONE CONTROL. In the Phone Control menu, select [6] NETWORK LOCK.

Select [3] Perso SHA256 Off. After selecting this option, wait about 30 seconds. Press the Menu button and select Back. Select [4] NW Lock NV Data INITIALLIZ.

Wait and reboot the device. After selecting [4] NW Lock NV Data INITIALLIZ, wait about 1 minute and restart the phone. You do not receive a message confirming the process was successful. You can check your phone by inserting the new carrier's SIM into the phone. If you are asked to enter the unlock code, the process has been successful.

Unlock Samsung Galaxy S4

Make sure your phone is suitable for this method. This method applies to Galaxy S4 from T-Mobile and AT&T. It can only be done on brand new phones. If the ROM is already running, it will not work.

This method does not work with CDMA phones like those from Sprint and Verizon.

Open the dialing screen. You need to enter the code to open the Service menu. After opening the dial screen, enter the code: *#27663368378#

Select [1] UMTS. After entering the code, the phone automatically opens the ServiceMode menu. At this step, you choose [1] UMTS.

Click on the menu option to select. If you choose the wrong option, press the Menu button on your phone and Back.

The Service Mode menu is a phone diagnostics menu that works extremely well. You should only change the settings specified in this article. Changing other settings may cause the machine to not work.

Open the Debug menu. In the UTMS menu, select [1] DEBUG SCREEN. In the Debug menu, select [6] PHONE CONTROL. In the Phone Control menu, select [6] NETWORK LOCK.

Select [3] Perso SHA256 Off. When selecting this option, the screen will display:
SHA256_ENABLED_FLAG[1]
SHA256_OFF => SHA256_ON

Select the first line. Select SHA256_ENABLED_FLAG[1]. The phone will display:
MENU NOT EXIST
PRESS BACK KEY
To continue, press the Menu button on the phone and select Back.

Make sure to change the correct settings. When backing up, the message in Step 4 will appear:
SHA256_ENABLED_FLAG[0]
SHA256_OFF => Not Change

Return to the UMTS menu. Press the menu button and select Back in the UMTS Main menu. Select [6] COMMON and select [6] NV REBUILD. The screen will display the message:
Golden-Backup exists
You can Restore Cal/NV

Restore backup. In the NV REBUILD menu, select [4] Restore Back-up. The phone will automatically reboot. The phone will be unlocked in this step. You can insert a SIM from another network to use the new service.

Unlock older Nokia phones (DCT3 & DCT4)

Find the IMEI number. You can dial *#06# to see the IMEI number. You can find the IMEI number printed on the battery tray after removing the battery. IMEI number has 15 digits.

Visit the free unlock website. Nokia phones are one of the few that can be unlocked using a code generated online. There are many websites that offer free unlock codes. You need to know.

Enter phone information. Enter IMEI number, phone model, country service, and network operator. This website will generate the specified unlock code for your phone.

You can check your phone model by dialing *#0000#

Enter the unlock code. To enter the newly created unlock code, insert another carrier's SIM into the device. The phone will ask you to enter a code.