Boost Mobile's carrier network is now AT&T. As of November 15, 2025, Boost Mobile completed the full migration of all its wireless customers to AT&T's nationwide 4G and 5G network, with the agreement between the two companies running through at least 2031.
Boost Mobile's carrier network is now AT&T
The definitive, up-to-date answer is that Boost Mobile primarily uses AT&T's network for both 4G LTE and 5G service. This means that when you sign up for Boost Mobile, your phone will connect to AT&T's physical cell towers, giving you access to the coverage and speeds that AT&T provides. The migration was completed on November 15, 2025, making any reference to Boost using T-Mobile or its own 5G network outdated.
The end of Boost's own 5G network and the T-Mobile era
Boost Mobile shut down its own physical 5G radio network on November 15, 2025. Prior to this, Boost Mobile customers used Sprint's network, and then T-Mobile's network for a period after the Sprint/T-Mobile merger. Common claims that Boost Mobile primarily uses T-Mobile's network or its own 5G network are incorrect as of late 2025. Boost Mobile does maintain a roaming agreement with T-Mobile for additional coverage, but AT&T is the primary network.
How Boost Mobile's hybrid network actually works
Boost Mobile operates as a "hybrid MNO" (Mobile Network Operator), which is distinct from a simple MVNO. Boost Mobile owns and manages its own cloud-native 5G core, which handles functions like authenticating phones, routing traffic, managing lines, and applying plans. However, it relies on AT&T's physical cell towers for the actual radio signal. This unique setup means Boost Mobile controls the software and services layer while using AT&T's infrastructure for coverage. This is why you see "Boost Mobile" on your phone instead of "AT&T," and why Boost Mobile services, including Boost Mobile Plans, Payments and Account Services, are managed directly by Boost. Boost Mobile also provides access to Wi-Fi hotspots across the country, further enhancing connectivity options for its customers. This feature allows users to conserve their mobile data while enjoying high-speed internet access in various public locations, such as cafes, airports, and shopping centers.
How to check which network your Boost phone is using
To determine the network your Boost phone is using, you can often check the carrier name in your phone's status bar. Alternatively, you can look within your device's network settings to see which network it is currently registered to. Most Boost Mobile users now connect to AT&T's 5G network.
Frequently Asked Questions
What is Boost Mobile's claimed nationwide coverage?
Boost Mobile claims 99% nationwide coverage, leveraging the expansive networks of its partners, primarily AT&T and its roaming agreement with T-Mobile.
Does Boost Mobile offer 5G speeds?
Yes, Boost Mobile offers 5G speeds for compatible devices, now delivered through AT&T's 5G network.
Can I use my current phone with Boost Mobile?
Boost Mobile supports a wide range of unlocked devices. However, since the network has changed to AT&T, it is essential to check that your phone is compatible with AT&T's network bands before making the switch.
