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4G/5G data
Same coverage - massive savings!YOU SAVE:
Magenta - $70/mo
Unlimited Extra - $75/mo
Play More Unlimited - $80/mo
Monthly cost
Average monthly data usage is only between 3-5GB
Avg. user rating

    Optimum Mobile SIM Cards

    Optimum Mobile BYOP SIM kit

    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 1GB1GBAT&T$14
    Optimum Mobile 3GB3GBAT&T$22
    Optimum Mobile Unlimited DataUnltdAT&T$45

    How do Optimum Mobile plans compare?

    Boost Mobile 5GB SIM card5GBAT&T & T-Mobile$5** 66% Off for 3 Months
    Good2Go Mobile 6GB SIM card6GBAT&T & T-Mobile$15** 50% Off for 3 Months
    Unreal Mobile 12GB SIM card12GBAT&T$20** Buy 2 Months Get 1 Free
    Boost Mobile Unlimited SIM cardUnltdAT&T & T-Mobile$25
    Red Pocket 50GB SIM card50GBAT&T & Verizon$50

    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

    User Rating Distribution
    5 Stars14
    4 Stars4
    3 Stars1
    2 Stars2
    1 Star64
    0 Stars0


    I wish i could give 0 stars! I just cancelled because I signed a contract for $40 a month thru altice it went to optimum then jumped to $53 & I no longer had signal in my home!! Trash company and I do not recommened

    Absolutely terrible!!! Worst service ever.

    International service made impossible to navigate.

    Should have been a zero stars. Left after 9 days!!!

    I had no ability to call out but could receive calls. Could not resolve after 2 days.

    They’re horribleeeee!!! Please do not get them!

    They stole from me, and gave me no service and permanently turned off both my lines. The data is horrible! Could not FaceTime anyone due to consistent data loss. Nasty customer service, along with you having to deal with Optimum mobile to permanently have my account removed due to a 61 dollar late payment? They’re are horrible people. They need to not do this mobile thing and stick to what they know best, television!!!!! That’s it!

    The customer service is horrible!

    Never have I had a worse experience with a customer service representative. They care nothing about customer loyalty.

    Simply horrible

    This service is horrible but not as horriable as the customer service you will receive. I was charge twice for the service of April because of a system failure with autopay. I have send paid documentation that reflects on my bank account and it took 3weeks of ongoing calls to customer service to get my money back. When they decided to return my money they issued a credit for the optimum bill instead of a credit back to my bank account. This was soooo horrible so once again am calling going on call #12 to have my service cancel and my money refunded THIS service is pure garbage you barely get any bars to make a phone call and the customer service is HORRIBLE please go elsewhere for your mobile service is not worth to agony


    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.

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