Best Optimum Mobile Plans (2025)

Optimum Mobile is the cell phone carrier arm of internet provider Optimum. Like Xfinity Mobile, Cox Mobile, and Spectrum Mobile, Optimum Mobile offers cell phone service plans to the company’s existing Internet customers.

Optimum Mobile’s plans are not just inexpensive (topping out at $55/month for a single line) but come backed by the reliability of the national T-Mobile network upon which they run. 

In this article, we’ll tell you everything you need to know about signing up with Optimum Mobile, and point to the best plan for each type of user.

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Best Overall Optimum Mobile Plan

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Best Cheap Optimum Mobile Plan

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Best Optimum Mobile Family Plan

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About Optimum Mobile Capped Data Plans

Optimum Mobile also offers two ultra-affordable capped data phone plans for users who don’t use much data at all. Their 1 GB and 3 GB plans offer just that — 1 GB or 3 GB per month, respectively. These plans also allow you to buy data top-ups for an additional fee, and they still offer unlimited talk and text, so they could be a great option for someone who doesn’t use much data or spends a lot of time using WiFi.

Optimum Mobile Coverage Map

Optimum Mobile runs on T-Mobile’s national system of 4G and 5G networks. Check out the map below to see how Optimum Mobile’s coverage is in your particular area.

Optimum Mobile 4G LTE Coverage

Optimum Mobile’s 4G coverage is generally excellent throughout the United States, apart from some isolated dead zones in rural parts of Nevada, Utah, Arizona, and sections of the Northwest. We recommend zooming into your particular town or city using the map above, however, to verify coverage in the places you spend time. 

Optimum Mobile 5G Coverage

Good news: Optimum Mobile customers get access to T-Mobile’s national 5G network, which happens to be the most far-reaching in the whole of the United States. T-Mobile has invested heavily in the expansion of 5G—outdoing the likes of Verizon and AT&T—and Optimum Mobile customers can reap the benefits. Some of this 5G network is made up of so-called Ultra Capacity 5G (UC), which offers enhanced speeds and reliability. 

Optimum Mobile Phones

While Optimum Mobile is particularly well-suited to customers who bring their own phones to the network, the carrier does offer a tidy selection of devices sale as well. This includes the latest iPhone 17 series.

Prefer to bring your own device (BYOD) to Optimum Mobile? It’s easy to check your compatibility online via the carrier’s online tool, and fast to activate service if you have eSIM functionality in your phone (as most recent models do).

The Bottom Line

Optimum Mobile offers one of the best values in wireless for existing Optimum Internet customers. By running on T-Mobile’s fast and far-reaching 5G network, the carrier combines nationwide coverage with plans that cost significantly less than those from the major players. Whether you need a simple 1GB plan, an affordable unlimited option, or a data-rich family plan, Optimum Mobile provides a range of choices to fit nearly any budget or usage level. For those already using Optimum for home internet, adding mobile service can be a smart and seamless way to save while keeping reliable coverage wherever you go.

Frequently Asked Questions

What network does Optimum Mobile use?

Optimum Mobile operates on T-Mobile’s 5G network, giving customers access to nationwide coverage and high-speed data without the higher prices of major carriers.

Does Optimum Mobile offer family or multi-line discounts?

Yes, Optimum Mobile offers discounted rates for multiple lines, with per-line prices decreasing as you add more lines to your account.

Can I bring my own phone to Optimum Mobile?

Yes, most unlocked phones are compatible with Optimum Mobile. You can check your device’s compatibility on their website before activating your plan.