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Optimum Mobile SIM Cards

Optimum Mobile BYOP SIM kit

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Optimum Mobile prepaid SIM card

Optimum Mobile SIM card description

  • Service is delivered on the nationwide AT&T and Sprint networks
  • Bring your own phone
  • Keep your own number
  • No contract
  • Mobile Hotspot available
  • International calling

Optimum Mobile 1GB SIM card

Optimum Mobile SIM Card - Optimum Mobile 1GB SIM cardOptimum Mobile SIM Card - Optimum Mobile 1GB SIM card
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Optimum Mobile 3GB SIM card

Optimum Mobile SIM Card - Optimum Mobile 3GB SIM cardOptimum Mobile SIM Card - Optimum Mobile 3GB SIM card
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Optimum Mobile Unlimited SIM card

Optimum Mobile SIM Card - Optimum Mobile Unlimited SIM cardOptimum Mobile SIM Card - Optimum Mobile Unlimited SIM card
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Optimum Mobile features

Data Speed5G & 4G LTE
3G NetworkGSM
Mobile Hotspot
Bring Your Phone
Keep Your Number
Credit Check
Customer Service
Money Back GuaranteeYes - 14 days
Taxes/fees included
WiFi Calling
Visual Voicemail
Multi-line Discounts
Multi-month Discounts
International Calls
International Roaming

Optimum Mobile compatible phones

As Optimum Mobile runs on the AT&T network their SIM cards are compatible with GSM phones. If you're not sure if your phone is compatible you can use our IMEI checker.

Most of the latest phones use both the GSM and CDMA technology.

Phone compatibility checker
Dial *#06# on your phone to access IMEI

Optimum Mobile coverage

Optimum Mobile is powered by the AT&T network, offering you access to their nationwide 4G LTE network and 5G where available.

Whether you're new to or have used them before, you can check cell phone coverage in your area using your ZIP code.

Find Cheap Cell Phone Plans in Your Area

Optimum Mobile SIM card data plans

Optimum Mobile 1GBAT&TUnltdUnltd1GB$14
Optimum Mobile 3GBAT&TUnltdUnltd3GB$22
Optimum Mobile Unlimited DataAT&TUnltdUnltdUnltd$45

How do Optimum Mobile plans compare?

Boost MobileAT&T & T-MobileUnltdUnltd2GB$15
Good2Go MobileAT&T & T-MobileUnltdUnltd6GB$17.50** 50% Off for 3 Months
Boost MobileAT&T & T-MobileUnltdUnltd15GB$20** $240 for 1 year service
Red PocketAT&T, Verizon & T-MobileUnltdUnltd25GB$40
Good2Go MobileAT&T & T-MobileUnltdUnltd3GB$12.50** 50% Off for 3 Months

Optimum Mobile SIM card benefits

There's a number of benefits when buying a SIM card kit with Optimum Mobile;

  • Prepaid: all plans are prepaid, so you can pick the features you want and pay upfront each month.
  • Same coverage: operating on one of the three major networks, you'll get the same quality coverage.
  • Keep your own phone: they make it easy to bring your own phone so you don't have to spend money upgrading to the latest handset, unless you want to.
  • Low cost plans: saving you up to $600 a year on your phone bill. Offering all the same features, but with half price plans.
  • Easy to switch: simply wait for your SIM kit to arrive, pop your new SIM into your phone and you'll be up and running, all within a few days.

Optimum Mobile SIM card activation

It's easy to bring your own phone to a cheaper carrier:

  1. Order the Optimum Mobile SIM starter kit online
  2. Replace the SIM card in your phone and follow the activation process
  3. If you're looking to transfer your phone number, this can take up to 24 hours

Optimum Mobile SIM card FAQs

How much is a Optimum Mobile SIM card?

There's a variety of cell phone plans available to suit all budgets, with prices between $14 - $45.

Where can I buy a Optimum Mobile SIM card?

One of the reasons low-cost carriers can pass on savings to you is because they are online only and don't have any physical stores. You can purchase a Optimum Mobile SIM card online.

What phones are compatible with Optimum Mobile SIM card?

Most unlocked phones are compatible with Optimum Mobile SIM cards. If you're not sure you can check your phone compatibility.

Can I bring my own phone to Optimum Mobile?

Yes. You can bring your own phone to Optimum Mobile and they're compatible with most unlocked phones. You can check phone compatibility on the carrier site prior to ordering.

What is Optimum Mobile SIM card starter kit?

Your Optimum Mobile SIM card starter kit includes everything you need to switch over. Pick your plan, order online, and it's delivered straight to your door. Follow the instructions to activate your new plan.

Optimum Mobile info

HeadquartersOne Court Square, Long Island City, Queens
Customer service(888) 211-4727

Optimum Mobile customer reviews

Optimum Mobile
Average Customer Rating79 User Reviews
User Rating Distribution
5 Stars14
4 Stars4
3 Stars1
2 Stars2
1 Star58
0 Stars0


I got two phones on my plan here in Amarillo. The internet and texting is fine, only a slight delay. However, we can NOT have a phone conversation on either phone. I can hear the other person, but they hear less than half what I say to them! If it was an emergency, I would be dead already. I tried to get help from customer service. They always say there is an issue in my area. Seriously, this has been going on for months. I can't cancel the service without paying off the phones. I can't keep paying the phones without the service. This is a total rip off trap!

Cheap if Grandfathered in!

I signed up in Jan. 2020 under Altice for $20 per month for life. It was awful at first starting with customer service to extremely slow service to no service. It was so bad, I almost went back to Verizon. I stick it out…..and glad I did. The customer service is not great…..but much better now. Actually, I haven’t needed customer service since I first joined. The phone service has improved greatly since they run T-Mobile now. Everyone’s experiences are different…..mine went from terrible to completely satisfied especially since it’s only $20.

Poor service reception and customer service

delayed transmission making conversations hard, poor service reception. billed for entire billing cycle for 2 days service.

Didn't get promised service and still charged

was signed up by Suddenlink without my knowledge for a service i did not agree to. Was charged for service I did not receive. Was charged a restock fee for a device I did not order. Cost me over $100 for nothing and would not refund any of the money. Customer service was rude.

Excellent price to performance

have had the service for 5 years w/o complaints

Very bad, pay for service you don't get.

Worst experience in Mobile ever, I don't know why they get Into something they don't know about. Horrible experience!!!!


I got charged for 2 months of service without ever even receiving a SIM card to activate service.

Optimum mobile lies about their speeds

The speed i get is about .3 download and .6 upload and 60 ping. The mobile hotspot is awful and I do not recommend. Also on the phone the worker was telling me that it’s good and my area has amazing coverage and I get it and I can’t even play a game without having 120 ping

Worst experience I have ever had

Thought I was getting internet and they sent me a phone instead. Told them I didn’t want a phone and canceled the service. Now 3 months later I am still getting charged for service that I canceled. Customer service is a joke. They just straight up lie and tell you it’s taking care. Can’t stress enough do not do business with this company. It’s been a nightmare


Optimum is the worst company I have ever had to deal with their customer services so horrid and basically nonexistent. I had the service for not even 30 days and couldn’t have gone worse. They canceled my plan for absolutely no reason and claim it was me who requested it to be canceled I am 100% up to date with payments and it is impossible to reach anyone with any kind of knowledge on customer service with this company. I have been without service for a full week going back and forth waiting to get my service back to give them the benefit of the doubt only to find out that they decided to cancel my service indefinitely. They also swiped my number so when I switch to another company I won’t be able to use my original phone number. they tell you they’ll reach out via email or text with updates and not once within the 10 times I reached out did they reach out with updates. I would never wish this upon even my worst enemy DONT do it it is genuinely the worst experience of my life. I’d rather pay 15 bucks more for an fully and entirely better service. They say risk free but that’s all it isn’t. It’s fully a risk I’ve lost too much and suffered and you know what they told me? Just wait til out. NEVER AGAIN

Samsung Galaxy Note10+ 5G
GSM Compatibility
CDMA Compatibility
LTE Compatibility
5G Compatibility
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