What Is Samsung Carrier Relock?

Samsung Carrier Relock is a method used to make Samsung phones appear unlocked.

The Current Problem with Samsung Carrier Relock

In recent years, many modern Samsung devices such as the Galaxy S22 Ultra, S23 Ultra, S24/S25 Series, and Galaxy Z Fold/Flip models have been sold as “officially unlocked.” However, in reality, many of these devices were only temporarily unlocked using a method known as Carrier Relock.

The issue with these devices is simple but serious:

• After a system update, firmware flash, or factory reset, the unlock code is lost.
• Once this happens, the phone becomes locked again to its original carrier.
• Since official unlocking services have been offline, it’s no longer possible to unlock these devices the same way as before.

This creates big problems for users and embarrassment for programmers who unknowingly sell or advertise these devices as “fully unlocked.”

How to Check If a Samsung Device Is Safe Before Purchase

To avoid buying a temporarily unlocked phone, you can verify its status using the SamFW IMEI check tool:

1. Go to samfw.com
2. Navigate to Other Tools > IMEI Check
3. Enter the device’s IMEI number
4. Review the Region field

• ✅ If the Region matches the original Carrier → the device is safe.
• ❌ If Carrier = XAA but Region = XAU / TMB / CHA / CCT / DSH → the device is only temporarily unlocked and will relock on the next update.

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Our Solution: Country-Specific Relock Unlock Service

CPID Server’s Relock Unlock Service

At CPID Server, we provide a Relock Unlock Service for specific Samsung models.

Unlike temporary methods being used without explanation, we want our clients to be fully aware of the situation before proceeding. This service is not a factory unlock — instead, it allows the phone to work permanently in the specific country you choose.

• ✔️ The phone will work with all SIM cards from the country you choose.
• ✔️ You can update, reset, or flash the device without losing the unlock.
• ❌ The phone will not work with SIM cards from other countries.

👉 This is why it is very important to confirm the correct country before requesting the service.

Supported Samsung Models

Galaxy S Series

• SM-S938U (S24 Ultra)
• SM-S937U (S24+)
• SM-S936U (S24)
• SM-S931U (S23)
• SM-S928U (S25 Ultra)
• SM-S926U (S25+)
• SM-S921U (S25)
• SM-S721U (S22 FE)

Galaxy A Series

• SM-A366U
• SM-A266U

Galaxy Z Series

• SM-F966U (Z Fold 6)
• SM-F956U (Z Fold 5)
• SM-F756U (Z Flip 5)
• SM-F741U (Z Flip 4)

Galaxy Tracfone Models

• SM-S366V
• SM-S266V

Warnings and Recommendations

• Always double-check the country of unlock before requesting the service.
• If the device Carrier = XAA, ask the seller to flash the correct XAA firmware.
• Hold sellers accountable if they advertise a phone as “factory unlocked” but it relocks after flashing.
• Be cautious with programmers or shops that do not explain the temporary unlock risk.

Final Thoughts

The safest choice will always be to purchase a factory unlocked Samsung device. But if you already own one of the supported models, our Relock Unlock Service is a reliable option that ensures you can keep using your phone safely in your chosen country—without the risk of losing the unlock after updates or resets.

At CPID Server, we believe prevention is better than cure. Stay informed, check devices before buying, and only trust permanent unlocking solutions.