Optimum Mobile Coverage Map (2025)

Optimum Mobile is a small carrier that offers a limited selection of unlimited and capped data plans to Optimum Home Internet customers. Like all MVNOs, Optimum Mobile runs on a larger carrier network to provide coverage to its customers—in this case, T-Mobile. 

That’s good news for Optimum Mobile customers, since T-Mobile operates excellent 4G LTE and 5G networks, and Optimum Mobile customers can mostly enjoy the same coverage. 

In this article, we’ll give you the ins and outs of Optimum Mobile’s coverage map, so you can decide whether it’s worth making the jump to the carrier. 

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 Plans

As mentioned, Optimum Mobile offers four plans (two unlimited data, two capped data) with which to enjoy the carrier’s excellent 4G and 5G coverage. 

Optimum Mobile Unlimited Plans

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The entry-level Optimum Mobile Unlimited offers 20GB of premium data, along with 5GB of high-speed mobile hotspot data. This plan represents one of the better values on the prepaid market, undercutting many competing plans at just $45/month. 

The midrange Optimum Mobile Unlimited Max offers more than twice as much guaranteed premium data (50GB), along with 15GB of mobile hotspot data to use a month. It’s a similarly cost effective option, coming in at just $55/month. 

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 Phones

You’ll want to make sure you have a phone model that contains the internal tech to make the most of Optimum Mobile’s 4G and 5G coverage. Optimum Mobile works with the latest Apple iPhone models, including the new iPhone 16 series, and the latest phones from Samsung, like the Galaxy S24 and the Galaxy Z Flip5. You can also BYOD (bring your own device to Optimum — you just have to make sure it’s compatible and install an Optimum Mobile SIM card.

Frequently Asked Questions

What Is Optimum Mobile?

Optimum Mobile is the mobile phone division of US-based Altice USA. Prior to 2019, Altice USA was primarily a provider of cable television and Internet services. In 2019, the company launched a mobile service branded as Altice Mobile, which has since rebranded to Optimum Mobile. Though they initially had an MVNO agreement with Sprint, Optimum Mobile has used T-Mobile’s network since Sprint was purchased by T-Mobile in 2020.

Is Optimum Mobile Good?

If you're a current Optimum Mobile home Internet customer interested in bundling your services for savings, Optimum Mobile is a good option to consider. A couple of factors you'll want to take into account as you decide if Optimum Mobile is right for you is whether there's coverage where you'll be using your cell phone most and if Optimum Mobile phone plans include enough cellular and hotspot data to meet your usage needs.

Does Optimum Mobile Have Good Service?

Optimum Mobile coverage and T-Mobile coverage are essentially one and the same. That's because Optimum Mobile uses the T-Mobile network to provide wireless service. Where T-Mobile has strong coverage, Optimum Mobile has strong coverage. Where T-Mobile coverage is spotty, Optimum Mobile coverage will be spotty. You get the picture. Essentially, you can expect the same nationwide coverage from Optimum Mobile that you get from T-Mobile.