Does AT&T México charge for the unlock code?

No. AT&T México says the unlock request is completely free.

How long does the code take?

AT&T México says it sends the code in less than 24 hours. If nothing arrives, check your spam folder, then contact them on *611 from your AT&T line or 800 288 2020.

Where do I type the unlock code?

Put a SIM from another network in the phone and switch it on. The phone asks for a network unlock PIN, and that’s where the code goes.

How many times can I try?

Only a few. A phone that runs out of tries can stay locked, so type the code slowly and check it before you confirm.

My Galaxy came from the United States. Will this work?

No. AT&T México only unlocks phones it locked itself. A Galaxy locked to AT&T in the US has to be unlocked through AT&T’s US request.

Network unlock

Unlocking a Samsung Galaxy on AT&T México

How to get AT&T México’s free unlock code for a Galaxy, where to type it in, and what to do if the code doesn’t arrive or doesn’t work.

5 minute read Facts checked 11 October 2026

Checked against AT&T México’s unlock page. Networks change their rules, so check there before you rely on a detail.

Rather not do it yourself? Let us handle it.

Tell us the phone, the country and the network. We check the phone first, then arrange the unlock with a specialist, so there are no forms or rules for you to work through.

We check the phone first: which network it’s locked to, and whether it’s been reported lost or stolen.
You don’t need to be the account holder, or track down whoever was.
No forms, account numbers or confirmation emails to chase.
If our check shows a lost or stolen report, we tell you before you pay for an unlock.
The phone stays with you the whole time.

Enter your IMEI number

It’s a 15-digit number. You can find it in Settings › About phone, or by dialling *#06#.

Country the phone is from

Network it’s locked to

Where do I find my IMEI?

The check costs $9.99. If the phone can be unlocked, you pay the specialist for the unlock itself, and you see their price first.

Doing it yourself, or letting us handle it

Doing it yourself with AT&T México

AT&T México only unlocks phones it locked itself. Many Galaxy phones in Mexico are really US AT&T phones, which need AT&T’s US process, in English.
You need an email address, a verification code and the IMEI, then a wait for the code.
The code has to be typed in correctly, with only a few tries before the phone can stay locked for good.
If the code doesn’t arrive or doesn’t work, it’s down to you to chase it by phone.

Letting us handle it

Type in the IMEI, pick the country and network, and pay for the check.
We check the phone before you spend anything more.
We send you to the unlock specialist with everything filled in. You don’t need the account holder.

Let us handle it

If you’d rather do it yourself

A Samsung Galaxy bought from AT&T in Mexico can be locked so it only accepts AT&T SIM cards. AT&T México unlocks its phones for free: you ask on its website, it emails you a code, and you type the code into the phone. Here’s how to do each step without wasting a try.

First: AT&T México or AT&T USA?

Some Galaxy phones in Mexico were first sold by AT&T in the United States. AT&T México can’t unlock those.

Bought new in Mexico from AT&T: follow the steps on this page.
Bought second-hand, or brought from the US: it may be a US AT&T phone. Our page on unlocking a Samsung on AT&T in the USA explains that route.
Not sure? Our diagnosis tells you which network the phone is locked to before you ask anyone.

To check whether it’s locked at all, put in a SIM from another network. If the phone asks for a network unlock PIN, or says the SIM isn’t supported, it’s locked.

Getting the free code

Find the IMEI

Dial *#06#. A Galaxy with two SIM slots shows two IMEIs; use the first one.
Go to AT&T México’s unlock page

Open att.com.mx/desbloqueo and enter your email address. AT&T México sends you a verification code.
Enter the code and the IMEI

Type in the verification code from the email and the phone’s IMEI, then send the request.
Wait for the unlock code

AT&T México says it arrives in less than 24 hours. Check your spam folder if you can’t find it.

If the phone is still on a plan or being paid for, AT&T México may ask you to finish paying it off first.

Typing the code into your Samsung

Switch the phone off

Take out the AT&T SIM and put in a SIM from another network, such as Telcel or Movistar.
Switch it back on

The phone asks for a network unlock PIN. On a phone set to Spanish it may say PIN de desbloqueo de red SIM.
Type the code carefully

Enter the code from AT&T México’s email and tap Unlock. Check each digit before you confirm.
Check it works

After a moment the phone should show the new network’s name and signal bars.

Don’t guess the code

If the code is rejected, stop and contact AT&T México rather than trying again. Too many wrong codes can leave the phone permanently locked.

If the code doesn’t arrive or doesn’t work

No email after 24 hours: check your spam folder, then call *611 from an AT&T line or 800 288 2020.
The phone never asks for a code: it may already be unlocked, or it may be locked to a different network. Try a SIM from another network to be sure.
AT&T México says the phone isn’t theirs: it’s probably a US AT&T phone. See unlocking a Samsung on AT&T in the USA.
It’s been reported lost or stolen: it can’t be unlocked.
Still locked? Our diagnosis checks which network the phone is locked to and whether it has been reported. If it can be unlocked, we direct you to a specialist provider, with your IMEI already filled in.