Check your Samsung Galaxy S25's carrier unlock requirements before switching to a compatible network provider.
What to Know First
- Contact your carrier: Ask about unlock eligibility and the process before deactivating your current service.
- You need your IMEI number: Dial *#06# on your Galaxy S25 to get this unique identifier before you call.
- Follow your carrier's instructions: Unlock requirements vary, so confirm how to complete the process for your phone.
- Be careful with attempts: Don't guess unlock codes; contact your carrier if an attempt fails.
- It's different from a SIM PIN: This code unlocks the phone from a carrier, not the SIM card itself.
Request the Code from Your Current Carrier
Your current carrier should be your first stop. Contact them to check their unlock requirements before deactivating your phone or activating it on another carrier. Call their customer service line or check their online unlock portal for instructions.
Have your Galaxy S25's IMEI number ready. You can find it by dialing *#06# on the phone's keypad. They'll also ask for your account information to verify you're the owner.
Eligibility rules may include the device being fully paid off, not reported lost or stolen, and having been active on the carrier's network for a certain period. Ask your carrier which requirements apply and how long its unlock process takes.
Use a Reputable Third-Party Unlocking Service
If you're considering a third-party service, first ask your carrier why the phone cannot be unlocked. A third-party service may be worth considering if you bought the phone second-hand and don't have the original account details.
Look for services with strong reviews and a money-back guarantee if the unlock fails. You'll provide the same IMEI number and your phone's model (SM-S931 for the base Galaxy S25, for example).
Check the service's fees, delivery terms, and refund conditions before paying. Contact your current carrier about any restrictions that prevent an unlock, and confirm what must happen before activating the phone on another network.
Enter the Unlock Code on Your Galaxy S25
If your carrier gives you an unlock code, follow its instructions for entering it. If those instructions require a different SIM, power your Galaxy S25 completely off, then remove the current SIM card from the tray.
Now, insert the SIM card from the different carrier as instructed. Your carrier's unlock process determines whether you need to enter a code, so check its instructions before proceeding.
Turn the phone back on. If it displays a prompt asking for the "Network Unlock Code" or "SIM network unlock PIN," carefully enter the code your carrier provided. If no prompt appears, check with your carrier about the next step.
Check for a Built-In Unlock Option
Some carriers, especially those that use the phone's software to manage the lock, include an unlock menu. It's worth a quick look before you do anything else.
Go to Settings > Connections > SIM manager on your Galaxy S25. Look for any option that says "Network unlock" or "Carrier unlock."
If you see it, you might be able to start the process right from there. Follow the on-screen instructions, and contact your carrier if you need help with its unlock requirements.
What to Do If You Get an Error Message
If you see "SIM network unlock PIN blocked," stop entering codes and contact your carrier with the exact message. Ask which unlock procedure applies to your phone before trying again.
An "Unsuccessful" message means the unlock attempt did not complete. Don't keep guessing. Double-check the code and instructions with your carrier or service, including whether you need to use a SIM from a different network.
For a "Device is blocked" error, contact your carrier with the exact message first. Ask it to check the phone's status and explain any restrictions before you try another unlock method.
Understand the Different Types of Locks
Your Galaxy S25 could have a few different locks. A carrier lock can prevent use on another carrier's network, while a SIM PIN protects the SIM card itself. Ask your carrier which restriction applies if you're unsure.
A SIM lock is different from a factory reset protection (FRP) lock or a Samsung account lock. Those are security features and won't be removed by a network unlock code.
Unlocking only affects the phone's ability to connect to different carrier networks. It doesn't remove any financial obligations you might still owe to the original carrier.
Perform a Reset After Unlocking (Optional)
Once the unlock is confirmed successful, it's a good idea to restart your phone. Press and hold the Volume down and Side buttons until the power options appear, then tap Restart and Restart again. If the phone is unresponsive, hold both buttons for more than 7 seconds until it restarts.
Restarting can apply the new carrier's software configuration after a SIM change on an unlocked phone. After the restart, try making a call or using mobile data to confirm everything works.
You don't need to factory reset an unlocked phone just to apply a new carrier's configuration. Your personal content and downloaded apps are preserved when switching carriers, though some carrier apps and features may change.
Verify the Unlock Worked
The easiest way to check is to insert a SIM card from a carrier you know the phone wasn't originally locked to. If it connects to the network and allows calls and data, you're all set.
As an optional extra, you can try dialing *#7465625# on the keypad to check for a lock-status menu. If no menu appears, use the SIM test and confirm the unlock with your carrier.
To check which network the inserted SIM is using, open Settings > About phone > Status information > SIM card status and look under Network. If the new SIM still cannot connect, contact your carrier to check the unlock and activation status.