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Samsung Unlock Codes List (Free & 8-Digit Codes) for 2026

Daisy Raines

Aug 29, 2026 • Filed to: Screen Lock Removal • Proven solutions

TL;DR:

Samsung does not have one universal free 8-digit network unlock code. When an NCK is required, it is tied to the device/carrier; some newer Galaxy phones instead support carrier-controlled remote or on-device unlocking. For models such as the Galaxy A15 or A16, use the original carrier’s unlock process rather than a generic code.
●An MCK/defreeze code is different from an NCK and is used when network-unlock attempts have been frozen. SIM PIN/PUK, screen PIN/password, Knox restrictions, and Samsung secret/service codes are also separate lock types.
●Legacy dialer codes found in older Samsung unlock lists may open service menus or trigger resets and data loss; they should not be treated as current carrier-unlock codes. Carrier-policy information was last checked on August 28, 2026 and may change.

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Quick Answer: There is no universal free 8-digit Samsung network unlock code. If a Galaxy phone is carrier-locked, the required Network Control Key (NCK) is tied to the device/carrier when a code-based unlock is used, while some newer Samsung phones and carriers support on-device or remote unlocking instead. For recent models such as the Galaxy A15 or A16, start with the original carrier rather than trying a generic code.

This page focuses on Samsung carrier/network unlock codes: what an 8-digit or longer NCK means, how to get an eligible carrier unlock, what an MCK/defreeze code is, and why many legacy dialer codes found online are not modern network-unlock codes.

If you searched for a Samsung PIN code unlock, Samsung secret code, emergency unlock code, or Knox unlock code, first identify the lock type. A screen PIN, SIM PIN/PUK, carrier network lock, MCK lockout, and Knox restriction are different problems and do not share one universal code.

Updated for 2026: Carrier-policy details in this guide were last checked on August 28, 2026. Carrier rules and Samsung menus can change, so verify the current policy before submitting an unlock request.

Part 1: What Is the 8-Digit Samsung Network Unlock Code?
Part 2: Legacy Samsung Unlock Codes: What They Actually Do
Part 3: How to Unlock a Modern Samsung Phone in 2026
Part 4: FAQ About A15/A16, PIN, MCK, Secret and Knox Codes

Part 1: What Is the 8-Digit Samsung Network Unlock Code?

Direct answer: An 8-digit Samsung network unlock code usually refers to an NCK (Network Control Key) used to remove a carrier/network restriction on supported devices. It is not a universal Samsung master code and it should not be guessed. The original carrier or its unlock system determines whether your phone receives an NCK, a different-length code, or a remote/on-device unlock.

Samsung support documentation describes NCK as the code used for a network lock and directs users to the mobile service provider for the resolution. Samsung also documents a Network unlock menu on supported Galaxy devices under Settings > Connections > More connection settings, although available options vary by carrier.

What You See	What It Usually Means	Where the Correct Code/Unlock Comes From	Universal Free Code?
SIM network unlock PIN / Network lock	Carrier or network restriction	Original carrier; some devices use remote/on-device unlock instead of a typed code	No
NCK / Network Control Key	Code used for a carrier network lock on supported devices	Original carrier or its approved unlock process	No
MCK / Defreeze / Unfreeze	Network-unlock counter has been frozen after failed attempts	Original carrier; in some cases Samsung support may direct the next step	No
SIM PIN / PUK	Lock on the SIM card itself, not the phone's carrier lock	Your mobile carrier	No
Screen PIN / Pattern / Password	Phone screen lock	Account recovery or a screen-unlock method; this is different from NCK	No network code applies
Secret/service code	Diagnostic, information, service, or reset function	Depends on device/firmware; not a replacement for an NCK	No

Important before entering any code

Do not repeatedly guess an NCK or MCK. Too many incorrect network-unlock attempts can trigger a frozen/defreeze state.
Do not treat reset codes such as *2767*3855# as a free carrier-unlock code. Reset/service codes can erase data or behave differently by model and firmware.
If your phone is a Galaxy A15, A16, or another current model, use the original carrier's eligibility and unlock process rather than legacy dialer-code lists.

How to use a carrier-provided Samsung network unlock code

Confirm the lock type. If the message says “SIM network unlock PIN,” “Network lock,” or similar wording, you are dealing with a carrier/network restriction rather than a screen PIN.
Get the IMEI. You can dial *#06# or check Settings > About phone. Use the IMEI requested by the original carrier.
Check eligibility with the original carrier. The carrier may provide an NCK, approve an automatic unlock, or direct you to the device's Network unlock menu.
Follow the carrier's exact instructions. If a code prompt appears, enter the code exactly as supplied. If the phone does not prompt, do not substitute random dialer codes; follow the carrier-specific unlock flow instead.

enter sim code

What if the phone asks for MCK or “defreeze”?

An MCK (Master Control Key) is associated with a frozen network-unlock state after failed code attempts. It does not permanently carrier-unlock the phone by itself; after the freeze is cleared, the correct NCK or carrier unlock process is still required. Because retry limits can be strict, do not guess an MCK.

enter samsung sim unlock code

Further Readings:

Part 2: Legacy Samsung Unlock Codes: What They Actually Do

⚠️ Legacy reference only: Many “Samsung unlock code lists” mix network-unlock placeholders with service-menu and factory-reset commands. The codes below are retained because users still search for them, but they should not be treated as universal free NCK codes. Behavior can vary by model, region, carrier, and firmware.

Model / Legacy Reference	Code or Format Commonly Cited	How to Interpret It
Galaxy S4	`27673855#`	Factory-reset/data-wipe code in legacy references; not a carrier NCK.
Note 2	`*#7465625#`	Legacy lock-status/service information; availability varies by firmware.
J600	`#0111UNLOCK#` or `#0149UNFREEZE#`	Legacy format using a device-specific unlock/unfreeze value, not a literal universal code.
SGH-P207	`27673855#`	Reset sequence cited in old guides; may erase data and should not be treated as a modern NCK.
SGH-A800	`2767637#`	Legacy memory/reset sequence; not a modern carrier-unlock code.
SGH-E400	`2767688#`	Legacy reset/service sequence; behavior can vary.
SGH-X100	`#99983323#`	Legacy service-menu sequence; not a universal NCK.
SGH 2100	`27673855#` and `27672878#`	Legacy reset sequences; data/settings can be affected.
SGH V200	`27677822573738#`	Old service/reset/unlock sequence reported for legacy firmware; not suitable for current Galaxy models.
SGH A400	`2767637#`	Legacy reset sequence; not a universal network unlock.
SGH E500	`2767688#`	Legacy reset/service sequence; firmware-dependent.
SGH-R210	`27673855#` and `27672878#`	Legacy reset sequences; not a current carrier-unlock method.

Why these codes are not the answer for Galaxy A15/A16

A Galaxy A15 or A16 carrier lock is tied to the original carrier's unlock policy and the device/account status.
There is no model-wide “Samsung A15 unlock code free” or “Samsung A16 network unlock code free” value that works across carriers and IMEIs.
If a current Galaxy device exposes Settings > Connections > More connection settings > Network unlock, use that carrier-supported path when available.

Legacy model references

1. Unlock Code for Samsung SGH-E400

Older guides commonly associate *2767*688# with SGH-E400 reset/service behavior. Treat it as a legacy device command, not an 8-digit carrier NCK, and back up anything that can still be backed up before experimenting with a vintage handset.

2. Unlock Code for Samsung SGH-X100

For SGH-X100, *#9998*3323# appears in legacy service-menu instructions. Menu availability and follow-up actions vary by firmware, so do not assume it will network-unlock every X100.

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3. Network Unlock Samsung SGH 2100

The sequences *2767*3855# and *2767*2878# are legacy reset commands found in older Samsung guides. They can affect device data/settings and should not be used as proof of a universal carrier unlock.

service mode

4. Unlock Samsung J600

Formats such as #0111*UNLOCK# and #0149*UNFREEZE# use placeholders: “UNLOCK” or “UNFREEZE” represents a device-specific value. They are not literal free Samsung master codes.

5. Enter Samsung Unlock Codes on SGH-P207

Old SGH-P207 walkthroughs combine factory-reset and service-menu commands, sometimes with 00000000. Because these instructions can erase data and are not a verified universal network unlock, use carrier/service documentation for the exact device instead of retrying generic sequences.

sim lock disabled

6. Unlock Samsung SGH-A800

*2767*637# is a legacy reset/memory command cited for the SGH-A800. It is not equivalent to an NCK and may remove stored phone data.

7. Unlock Samsung SGH V200

*2767*7822573738# appears in old SGH V200 instructions. Treat it as firmware-specific legacy information rather than a code that can be reused on current Samsung phones.

8. Unlock Samsung SGH A400

*2767*637# is associated with reset behavior on older Samsung handsets. It should not be used as a modern network-unlock shortcut.

9. Samsung SGH E500 Unlock

*2767*688# is a legacy reset/service sequence. If you are trying to remove a carrier lock, obtain the carrier-specific unlock method instead of relying on this code.

10. Samsung SGH-R210

*2767*3855# and *2767*2878# are legacy reset sequences. They are included for historical reference and are not recommended as a current Samsung network-unlock method.

Part 3: How to Unlock a Modern Samsung Phone in 2026

Method 1: Use the Original Carrier's Network-Unlock Process

For a real carrier/network lock, start with the original carrier. Samsung's own support materials describe network lock/NCK as a carrier-controlled restriction, and newer Galaxy phones may expose a carrier-dependent Network unlock menu instead of requiring a generic dialer code.

General steps:

Confirm that the issue is a carrier/network lock, not a screen PIN, SIM PIN/PUK, FRP, or Knox restriction.
Find the IMEI with *#06# or Settings > About phone.
Check the original carrier's current eligibility rules and unlock status.
Follow the carrier's instructions. Depending on the carrier/device, the unlock may be automatic, completed through a Samsung Network unlock menu, or require an NCK supplied specifically for that phone.

Carrier	2026 Policy Snapshot	What This Means for a Samsung Phone
AT&T	For postpaid devices, current eligibility includes requirements such as the device being 60+ days old, paid in full, not reported lost/stolen or involved in fraud, and the account being current. Eligible Samsung devices may unlock automatically.	Check the device status first; submit an unlock request if it is eligible but still locked.
T-Mobile	For postpaid devices, T-Mobile currently requires the device to have been active on the requesting line for at least 40 days and paid in full if financed, along with other eligibility conditions.	Check unlock status in the account/app. Supported eligible devices can be unlocked remotely.
Verizon	Under Verizon's policy effective January 27, 2026, postpaid devices are generally unlocked when the device is paid in full, subject to fraud/lost/stolen conditions. Devices bought under the older policy may have followed the prior 60-day rule.	Do not rely on older “Verizon always unlocks after 60 days” advice for a newly purchased 2026 device; check the current policy for the purchase date and plan type.

Sources checked on August 28, 2026:

Carrier policies can change. Use the carrier's current page as the final authority for eligibility.

Network lock and screen lock are different

The existing Dr.Fone module below addresses screen locks and FRP. It is not a substitute for the original carrier's NCK or network-unlock approval when the problem is a carrier/SIM restriction.

Method 2: Using Dr.Fone – Screen Unlock (Best for FRP & Screen Locks)

Dr.Fone - Screen Unlock (Android) is one of the most reliable alternatives to Samsung unlock codes, especially when dealing with modern devices. Unlike risky code-based methods, it offers a structured, safe unlocking process that avoids system errors and data loss. With its cutting-edge technology, Dr.Fone offers a risk-free and data-loss-free solution to unlock your Samsung phone, allowing you to retain all your precious data, including contacts, photos, and messages. Unlike complex and technical methods that require Samsung unlock codes, Dr.Fone provides a safe and easy-to-use alternative that's perfect for general users. Whether you're stuck with a pattern lock, PIN code, or password, Dr.Fone can efficiently unlock your Samsung device, including popular models like the Galaxy S series and Note series.

Dr.Fone - Screen Unlock (Android)

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Steps to unlock Samsung phone without a password

Step 1. Click the button above to download and install the Wondershare Dr.Fone on your computer.
Step 2. Open the “Screen Unlock” > "Unlock Android Screen" and then use a USB cable to connect the Samsung phone to the computer.

dr.fone screen unlock

Step 3. Select one solution to remove your locked screens according to your device model. And then select your device brand Samsung.

select device brand

Step 4. Follow the on-screen instructions to get your Samsung phone into the specific mode. Dr.Fone will start to unlock Android screen after getting into the specific mode.

select device brand

Step 5. Wait for the unlock process to complete. Now, you can access your Samsung phone without any password.

unlock samsung complete

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Why Dr.Fone?

✔ No data loss (vs. factory reset codes)
✔ Works on latest Samsung models (S25, Flip 7, One UI 8.0+)
✔ Removes FRP (Google Account Lock)

Part 4: FAQ About A15/A16, PIN, MCK, Secret and Knox Codes

Q1: Is there a universal Samsung unlock code?

No. A carrier/network unlock is tied to the original carrier's policy and, when an NCK is used, to the specific device. A screen PIN, SIM PUK, MCK, Knox restriction, and secret/service code are different lock types and do not share one master code.

Q2: What is the 8-digit unlock code for Samsung?

An 8-digit Samsung unlock code usually means an NCK used by some carrier-locked devices. It is not 00000000 or another universal free value. Get the code or unlock authorization from the original carrier and enter it only when the phone/carrier instructs you to do so.

Q3: Is there a free Samsung A15 or A16 network unlock code?

There is no universal model-wide free code for the Galaxy A15 or A16. If the phone is carrier-locked, check the original carrier's eligibility rules and the device's Network unlock status/menu when available. An eligible carrier unlock may be free, but the authorization is specific to the device/account.

Q4: What does “Samsung PIN code unlock free” mean?

First identify which PIN is being requested. A screen PIN protects access to the phone, a SIM PIN/PUK protects the SIM, and a SIM network unlock PIN refers to a carrier network lock. They require different recovery methods.

Q5: Is there a free Samsung Knox unlock code?

No universal Knox unlock code exists. Knox Guard or enterprise-management restrictions are separate from a carrier network lock. The correct resolution depends on who applied the restriction, such as an organization, financing/retail program, or device administrator. Do not use NCK or reset-code lists as a substitute.

Conclusion

The fastest way to solve a Samsung “unlock code” problem is to identify the lock before trying any code. If the phone is carrier/network locked, use the original carrier's unlock process and the device-specific NCK or on-device unlock method it provides. If the phone asks for a SIM PUK, contact the carrier for the SIM; if it is a forgotten screen PIN or FRP lock, use a screen-lock recovery route instead.

Final Recommendation:

8-digit / 16-digit network code → Treat it as a carrier/device-specific NCK, not a universal Samsung code.
Galaxy A15 / A16 carrier lock → Check the original carrier and Network unlock status; do not use legacy reset codes.
MCK / defreeze prompt → Stop guessing and request the correct carrier-supported recovery path.
Secret or emergency code searches → Use the dedicated diagnostic/screen-lock guidance rather than expanding this page into unrelated bypass topics.
Legacy SGH/Galaxy codes → Keep as historical reference only; some are reset/service commands that may erase data.
Screen/FRP lock → This is separate from carrier unlock; the existing Dr.Fone screen-unlock module on this page covers that scenario.