You might be ready to ditch Big Blue, but you don't have to leave your phone. Here's how to unlock an AT&T phone by yourself.

Marsh reiterates AT&T's unlock policy by stating: "if we have the unlock code or can reasonably get it from the manufacturer, AT&T currently will unlock a device for any customer whose account has ...

For example, AT&T has a Device Unlock Portal where you can enter in some account information or information about the phone you want to unlock, and then AT&T will approve or deny your request.

4. Enter unlock code Once AT&T emails you the 20-digit unlock code, you can enter it on your Nokia Lumia 1520 device. Go to the phone dialer and tap ##7820#.

One common issue that some users face is their new phone not accepting their SIM card, requiring an unlock code. We will cover various methods to obtain the unlock code and troubleshoot your SIM ...

Place an unlock request with your carrier. AT&T’s website includes an online form for submitting this request, while you’ll need to contact Sprint or T-Mobile directly to start the process.

AT&T executives met with FCC officials to explain why it thinks it would be a mistake to allow customers to unlock their phones sooner.