To unlock your AT&T SIM card, you submit an unlock request on AT&T’s official unlock page and then finish the process by inserting a non-AT&T SIM card or entering a device unlock code. This allows you to switch carriers or use a local SIM while traveling, giving you full control over your device’s network access.
Before you unlock your AT&T SIM card
First, check if your device is already unlocked. On an iPhone, Apple says to check Settings > General > About and look at Carrier Lock. If it says No SIM restrictions, the device is unlocked. You can also insert a non-AT&T SIM card. AT&T says inserting a non-AT&T SIM card is one way to verify unlock status. If the device shows that the SIM card is not compatible with the AT&T network, AT&T says the device is still locked. This step saves you time by confirming whether you need to proceed with an unlock request.
How to submit an unlock request to AT&T
- Go to AT&T’s official unlock page.
- Provide the device’s IMEI number and your AT&T account details.
- Submit the unlock request.
AT&T reviews the request and, if approved, sends instructions to complete the unlock. AT&T provides a separate unlock status page that uses the device IMEI or request number. The unlock request is tied to AT&T’s device unlock process, and eligibility rules apply. After approval, you are ready for the final step.
Finish unlocking with a new SIM card
- Power off the device.
- Remove the AT&T SIM card and insert a SIM card from another carrier.
- Power the device back on.
Apple says that to finish unlocking an iPhone, you remove the old SIM and insert the new SIM, then the device activates. If you have a physical SIM, you can remove and reinsert it, and try another SIM if needed. This completes the activation and confirms the unlock.
Alternative method: enter an unlock code
For older devices that require a code, AT&T provides a secondary method. AT&T's PDF instructions for code-based unlocking start by turning the device off or turning wireless off, depending on model. After receiving the unlock code from AT&T, power off the device and insert an AT&T SIM. Then enter the code using one of AT&T’s documented steps for your device family. For example, on BlackBerry-style devices, go to Settings > Options > Advanced Options > SIM Card, hold ALT and type MEPD, then ALT and type MEP2, enter the unlock code, and press Enter. On another supported device flow, turn off the device, insert an AT&T SIM, turn it on, enter *#865625# on the idle screen, select Yes at the warning, then on the SIM Unlock screen enter the 16-digit unlock code and select OK, then re-enter the same code. AT&T’s PDF says to reboot the device after entering the unlock code. AT&T’s detailed PDF instructions cover specific models. After the code is entered, the device is unlocked.
Use the AT&T Device Unlock app for prepaid phones
Certain AT&T Prepaid devices, including the Alcatel Insight 5005R, AT&T Maestro U202AA, AT&T Radiant Core U304AA, LG Arena 2 LM-X320APM, LG Neon Plus LM-X320AM8, and LG Phoenix 4 LM-X210APM, use a dedicated Android app called AT&T Device Unlock. The app works only with these specific prepaid devices and provides a direct unlock method without needing to enter a code.
Verify your SIM card is unlocked
After completing the unlock, confirm it worked. On an iPhone, open Settings > General > About and check that Carrier Lock shows No SIM restrictions. If you inserted a non-AT&T SIM, ensure the device connects to that network without showing an error that the SIM is not compatible with the AT&T network. If the non-AT&T SIM shows the AT&T network compatibility message, AT&T says the device is still locked. Apple says restarting iPhone can also help when troubleshooting SIM or carrier issues. This verification gives you confidence that your device is ready for unlocking carrier phones from Verizon, AT&T and T-Mobile, and for activating phones and SIM cards on any carrier.
Frequently Asked Questions
How long does it take to get an unlock code from AT&T?
AT&T reviews unlock requests and sends the code or instructions by email. The processing time varies based on eligibility checks and device type, so check your email regularly after submitting the request.
Can I unlock my AT&T phone if I still have a contract?
AT&T has eligibility rules for unlocking. You may need to meet requirements such as completing your service term or paying off any device installment plans. Check AT&T’s unlock page or contact customer service for your specific situation.
Will unlocking my AT&T phone work with any carrier?
An unlocked AT&T device is compatible with most GSM carriers, but network compatibility depends on the carrier’s bands and technology. Verify with the new carrier that your device supports their network before switching.
What if I enter the unlock code incorrectly?
Entering the wrong code multiple times can permanently lock the device. If you are unsure of the code, double-check the code from AT&T and follow the exact entry steps for your device model. Contact AT&T support if you encounter issues.
Does unlocking my AT&T SIM card affect my warranty?
Unlocking through AT&T’s official process should not void your device warranty, as long as you follow their procedures. If you have concerns, confirm with AT&T before proceeding.
