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When buying a phone from a carrier, it is often locked to only use that carrier’s service. If you want to use another carrier’s service, you’ll need to unlock your device. That way, you can use a SIM from another carrier.
Steps
Jailbreak through carrier
Contact your carrier’s customer service switchboard. If you meet the carrier’s requirements, you can unlock your phone for free.
Ask about unlocking the device. The requirements for unlocking your device vary from carrier to carrier, usually you need to commit to their service for a period of time (usually 3-6 months), and you’ve already paid the full amount. buy a phone.
- You may be charged an early termination fee if your phone set is not paid.
Wait for the code. You will be provided with an unlock code by phone or by email.
Insert the new SIM into the phone. You need to buy a SIM from a new carrier to receive a request to enter a 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 paperclip 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. Make sure to enter the correct code because if you enter it wrong too many times the phone may be locked.
- Make sure you’re within the service coverage of your new carrier when you unlock your device.
Unlocking via the Unlocking paid service
Rewrite the phone’s IMEI number. This is the phone identifier and is used to unlock the device.
- On most phones, 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 box.
Find services. There are many companies online that sell unlock codes for your phone for a certain fee. Different services provide unlock codes for different devices.
- You should avoid services that help unlock your phone after completing a survey or requesting something. These sites often scam to collect your personal information.
Research and choose services. Before paying a company to unlock your phone, do your due diligence. Read user reviews, consult on mobile forums. Always use caution to avoid scams, especially when you’re paying to avoid carrier policies.
Pay for services. 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 carrier that gives you the code.
- Don’t forget to select all the correct device information to get 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 phone. The SIM slot on each model is located in a different position. Normally, 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 paperclip 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 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 the coverage area.
Unlock Samsung Galaxy 3 and Note 2
Make sure the device is up to date. The phone must be running 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 heading Android Version.
- 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, download and install them.
Open the dialer screen. You need to enter the code to open the Services menu. After opening the dialing screen, enter the following code: *#197328640#
Select [1] UMTS. After entering the code, the phone automatically opens the ServiceMode menu. At this step, you choose[1] UMTS.
- Tap the selection menu on the screen and choose. If the wrong option is pressed, 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 Contrp menu, select [6] NETWORK LOCK.
Select [3] Person 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 restart the machine. After selecting [4] NW Lock NV Data INITIALLIZ, wait about 1 minute and restart the phone. You do not receive a confirmation that the process was successful. You can test your phone by inserting a new carrier’s SIM into it. If asked to enter the unlock code, the process was successful.
Unlock Samsung Galaxy S4
Make sure that your phone is suitable for this method. This method applies to Galaxy S4 of T-Mobile and AT&T carriers, only works on newly rooted phones, if it is already running ROM, it will not work.
- This method does not work with CDMA phones like Sprint and Verizon phones.
Open the dialer screen. You need to enter the code to open the Service menu. After opening the dialing screen, enter the code: *#27663368378#
Select [1] UMTS. After entering the code, the phone automatically opens the ServiceMode menu. At this step, you select [1] UMTS.
- Click the menu selection to select. If the wrong option is selected, press the Menu button on your phone and Back.
- The Service Mode menu is the phone’s diagnostic menu, which works extremely well. You should only change the settings specified in this article. Changing other settings may cause the machine to become inoperable.
Open the Debug menu. In the UTMS menu, select [1] DEBUG SCREEN. In the Debug menu, select [6] PHONE CONTROL. In the Phone Contrp menu, select [6] NETWORK LOCK.
Select [3] Person SHA256 Off. When this option is selected, the screen will show:
SHA256_ENABLED_FLAG[1]
SHA256_OFF => SHA256_ON
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 your phone and select Back.
MENU NOT EXIST
PRESS BACK KEY
To continue, press the Menu button on your phone and select Back.
Make sure to change the settings correctly. When backing up, the message in Step 4 will appear:
SHA256_ENABLED_FLAG[0]
SHA256_OFF => Not Change
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:
Gpden-Backup exists
You can Restore Cal/NV
Gpden-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 at this step. You can insert another carrier’s SIM to use the new service.
Unlock old Nokia phones Nokia (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 unlocking site. Nokia phones are one of the few that can be unlocked with 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, carrier. This website will generate an unlock code specified for your phone.
- You can check the phone line by dialing *#0000#
Enter the unlock code. To enter the unlock code you just created, insert another carrier’s SIM into the device. The phone will ask you to enter the code.
Warning
- Unlocking your phone may violate the terms of your cell phone provider’s contract. In that case, you could face penalties for breach of contract and service interruption. Do your research before performing unlocking your phone.
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This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 4,470 times.
When buying a phone from a carrier, it is often locked to only use that carrier’s service. If you want to use another carrier’s service, you’ll need to unlock your device. That way, you can use a SIM from another carrier.
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