WHAT IS AN UNLOCKED PHONE AND HOW DOES IT WORK?

By Boost Mobile

Published July 11, 2025

Boost Blog Unlocked Phone
Boost Blog Unlocked Phone

In this guide, we’ll be breaking down the basics of unlocked phones, how they work, and why they might be your key to savings and freedom. Plus, we’ll show you how Boost Mobile makes it easy to go unlocked and stay connected.

What Is an Unlocked Phone?

An unlocked phone is any phone that isn’t tied to a specific carrier. This means you can use it with a variety of network providers, as long as the device is compatible. Unlike locked devices, which are often sold by carriers with usage restrictions, unlocked phones give you the power to choose how, when, and with whom you connect. 

 

If you want affordable and easy access to unlocked phones, we’ve got plenty of the latest and greatest devices at prices that keep your wallet happy.

How Does an Unlocked Phone Work?

SIM Cards and Network Compatibility

Unlocked phones operate by accepting SIM cards from any compatible carrier. While past network technologies like GSM and CDMA used to complicate compatibility, most modern phones now support a range of bands and frequencies. That said, it’s always important to double-check that your phone works with your preferred carrier’s network.

Switching Carriers with Ease

One of the biggest perks of an unlocked phone is how easy it makes switching carriers. No need to buy a new device or deal with unlocking procedures — just swap the SIM, update a few settings, and you’re all good.

Benefits of Going Unlocked

  • Use any carrier that supports your device 

  • Travel internationally with ease by using local SIM cards

  • Skip the long-term contracts and credit checks

Unlocked vs. Locked Phones: What’s the Difference?

Carrier flexibility

Upfront cost

Long-term value

Best for

Unlocked Phones

Use any compatible network

Typically higher

Higher resale value

Prepaid and frequent switchers

Locked Phones

Tied to one carrier

Often subsidized

Must be unlocked to resell

Customers financing through a carrier

Locked phones are typically sold by carriers and come with restrictions that prevent them from working with other networks until certain conditions are met. In contrast, unlocked phones provide the freedom to choose your service, which is why prepaid users often prefer them.

Are Unlocked iPhones Available?

Unlocked iPhones are some of the most popular choices for users who value device longevity, high resale value, and flexible service options. Whether you’re Team iPhone or Team Android, Boost Mobile offers affordable prepaid plans that let you use the device you want, your way.

Can You Still Buy an Unlocked iPhone?

Yes, you can buy unlocked iPhones at boostmobile.com. Not sure if a phone is unlocked? Here’s how to check:

How to Check If Your Phone Is Unlocked

  • iPhone: Go to Settings > General > About. If it says "No SIM restrictions," your phone is unlocked.

  • Android: Go to Settings > Network > Mobile Network > Network Operators. If multiple networks appear, your phone is likely unlocked.

How to Unlock Your Phone

Already have a locked device? You may be able to unlock it depending on your carrier's policies. For Boost Mobile's BYOD process, visit our Bring Your Own Device page for full instructions.

 

Already have a locked device? You may be able to unlock it depending on your carrier’s policies. For Boost Mobile’s BYOD process, visit our Bring Your Own Device page for full instructions.

Why Choose Boost Mobile for Your Unlocked Phone?

Affordable Prepaid Plans with No Contracts

Get more for less with Boost’s flexible, no-commitment prepaid plans. Explore our Prepaid Plans to find the one that fits your needs.

Bring Your Own Phone or Shop New Devices

Already love your phone? Bring it with you! Or browse our wide selection of phones to find your next upgrade. Either way, we’ve got you covered.

Coverage

Boost keeps you connected coast-to-coast with fast, reliable service. Whether you're looking to make a switch, travel smarter, or just save money, going unlocked puts the control in your hands. And with Boost Mobile, the process is simple, affordable, and packed with perks.

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