Where to buy a Optimum Mobile SIM card

Optimum Mobile
Unlimited data
AT&T 5G & 4G networks
$540/yr Total cost
Unlimited data
AT&T 5G & 4G networks
Save $252.50/yr
* 50% Off First Month
Unlimited data
T-Mobile 5G & 4G networks
Save $225/yr
* Only $45 for 3 Months
Unlimited data
Verizon 5G & 4G networks
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* FREE 50 Day Trial + $50 Gift Card
Rob Webber
Rob Webber

Rob Webber


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Rob has 15+ years experience running price comparison & review websites that empower consumers to find the cheapest cell phone services, cell phone deals, home phone, and internet providers available. He has been published in Forbes, US News, Entrepreneur, Huffington Post, Inc.

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There are two ways to get your Optimum Mobile SIM card. The first option is to visit your local Optimum store.

Alternatively, you can place an online order, and your new SIM card will be delivered to your doorstep within a few days.

Want to see if this T-Mobile MVNO has service in your area? Find out with our Optimum Mobile coverage map.

Can I buy an Optimum Mobile SIM card at a store?

Yes. If an Optimum store is near you, they can set you up with an Optimum Mobile SIM card.

Before you head to the store, it's worth checking Optimum Mobile plans online first. You might be able to get better bundle deals that way.

Buy an Optimum Mobile SIM card online

Ordering and setting up your Optimum Mobile SIM kit online is straightforward. Your SIM card will be on your doorstep within a few days.

Or, get your new plan activated almost instantly with an eSIM plan.

Activating your Optimum Mobile SIM kit

You'll activate your Optimum Mobile SIM card using your Optimum MyMobile account.

If you bring your own phone to Optimum Mobile, make sure it's unlocked from your existing carrier.

Log in and follow the simple activation instructions, then insert your SIM card into your phone to start enjoying your new plan. That's all there is to it!

Optimum Mobile phone compatibility

Optimum Mobile operates on the same 4G LTE and 5G networks as T-Mobile. Plug your IMEI number into our handy phone compatibility checker to determine whether your device is compatible.

Optimum Mobile SIM card FAQs

Are Optimum Mobile and Suddenlink the same thing?

Altice, which is Optimum's parent company, rebranded Suddenlink to Optimum Mobile in 2022.

Can you get Optimum Mobile without Optimum Internet?

Unlike some other mobile providers that sell broadband, Optimum Mobile doesn't require you to have an Optimum internet plan.

That said, Optimum Internet customers are eligible for lower prices on Optimum cell phone plans.

What network does Optimum Mobile use?

Optimum Mobile is a T-Mobile MVNO. As an Optimum Mobile customer, you get the benefit of T-Mobile's nationwide 4G LTE and 5G networks and save money at the same time.

Does Optimum Mobile have mobile hotspot capability?

Yes, you can use your Optimum Mobile phone as a mobile hotspot. Depending on your plan, you'll either have separate mobile hotspot data, or it will pull from your phone plan's data limit. Data speeds also vary depending on what plan you have.

Does Optimum Mobile have international calling?

Yes. Optimum Mobile offers international talk, text, and data options. They also have international roaming packages for when you're traveling abroad.


To sum up, you can order your Optimum Mobile SIM card online or buy it in your local Optimum Mobile store.

And by choosing to bundle Optimum Mobile plans with your Optimum Internet service, you could be in for even more savings.

Check out our Optimum Mobile review for more in-depth information about this low-cost carrier.

Compare the cheapest cell phone plans to find the best prepaid SIM card.