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Ultra Mobile

Ultra Mobile 4GB Prepaid SIM Kit, 1-Month Plan on the T-Mobile 5G Network

  • Based on 1,322 reviews
Condition: New
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Prime Big Deal · 87% off was $139.99

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As low as $4 / mo
  • – 4-month term
  • – No impact on credit to apply
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Availability: Only 2 left in stock, order soon!
Fulfilled by Amazon
Arrives Thursday, Oct 8
Order within 15 hours and 40 minutes
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Size: 4GB


Features

  • STAY CONNECTED WORLDWIDE: Unlimited calling from the U.S. to 90+ international destinations including India, Mexico, Canada, China, the U.K. and more.
  • RELIABLE NATIONWIDE COVERAGE: Enjoy 4GB of high-speed 5G/4G LTE data on the T-Mobile 5G Network.
  • TRAVEL ACROSS NORTH AMERICA: Unlimited talk and text in Mexico and Canada plus international roaming credit.
  • BRING YOUR OWN PHONE: Activate your compatible unlocked phone with the included 3-in-1 SIM card or eSIM. Keep your number or get a new one.
  • NO CONTRACTS: 1-Month prepaid wireless plan with no annual contracts, no credit checks, and no hidden fees.

Description

UNLIMITED CALLS FROM U.S. TO 90+ DESTINATIONS Stay connected to friends and family across the globe with international calls from the U.S.. See our list of destinations below. Unlimited Mobile & Landline Calling from the U.S. to: Unlimited Landline Calling from the U.S. to: *International rates and destinations are subject to change at any time without notice. See site for the latest rates and info. Most phones are compatible with our network. If you're unsure, visit the Ultra Mobile Bring Your Own Phone (BYOP) webpage to check your phone's compatibility. An unlocked phone is one that is not tied to a specific carrier or phone plan, allowing you to move freely among multiple carriers to find the best phone plan for you. Before activating, decide whether you want to keep your phone number or get a new one. Follow the directions included in your SIM kit to activate. You have the option to keep your current phone number or get obtain a new one. Our 3-in-1 SIM card includes standard, micro, and nano sizes. Punch out the SIM that fits your device. Insert SIM into your phone using the included SIM ejector tool and start enjoying your service.

Brand: Ultra Mobile


Service Provider: T-Mobile


Cellular Technology: LTE


Product Dimensions: 5.5"L x 4"W


Item Highlight: Unlimited calling to 90+ international destinations, U.S. talk, global text, hotspot, Wi-Fi Calling, keep your phone & number See more


Brand: Ultra Mobile


Service Provider: T-Mobile


Item Highlight: Unlimited calling to 90+ international destinations, U.S. talk, global text, hotspot, Wi-Fi Calling, keep your phone & number


Unit Count: 1 Count


UPC: 853455004396


Number of Items: 1


Item Weight: 18.42 g


Model Number: 1-Month, 4GB


Manufacturer: Ultra Mobile


Mfr Part Number: 3GB


Cellular Technology: LTE


Item Dimensions L x W: 5.5"L x 4"W


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Works perfect
Size: 4GB
I like this it works perfect
Reviewed in the United States on July 16, 2026 by My business
    • Comunication is the propose
Size: 4GB
Call Only call. This is the proposed
Reviewed in the United States on August 27, 2026 by Paulo Henrique
    • Illegal advertising by seller. Terrible Service
Size: 4GB
Illegal advertising by seller. Package front and back both state: "Unlimited Talk, Text, & Data". But on the front bottom, it states, "3G Data", and the listing details state: "3GB of High-Speed 5G 4G LTE Data." How can it be limited to 3G of data if it clearly states "unlimited data" on the package front and back. I contacted the seller, Ultra Mobile" about this and asked the same question. They referred me to Amazon to complain to you, if I received the wrong SIM card. However, I was starting to message back to them in the chat that I did not get the wrong SIM, I got the one I ordered, but the seller has put misleading info on the package. Before I could even send that reply message, the chat rep from Ultra Mobile ended the chat as soon as they sent me the message saying to contact Amazon about it. Set up was very complicated, took a very long time to try and get this all straightened out. The activation instructions said I have to change the settings for Access Point Names, which was a long process. But it also seemed as though the Access Point Names were automatically configured during activation. I am unable to access voicemail unless I reset network settings to factory default settings on my phone, which I don't want to do, since I am only trying out this SIM on my phone, and plan to revert back to my Tracfone network. If I reset network settings, all data, bluetooth, & wifi settings will be deleted. That would mean that when I reinstall the Tracfone card, I will not be able to access my voicemail on that network, plus I won't be able to log into my wifi or use my previously paired bluetooth devices with my phone. When the phone is initially set up, and I call my home phone from the mobile using the SIM card, it comes up as "April Bailey", which is not me. There is no way to resolve or change this. Ultra Mobile said they would escalate that, but I dont know if they will fix it. I have had two chats with their customer service, which both went about 1 hour. The chat reps seem to be chatting with multiple people at the same time, so their responses usually take a very long time & they never admit to chatting with multiple people simultaneously when asked directly about it. They claim they are checking resources or having system issues. Most of the chat time is spent waiting for them to respond. When I asked why the physical packaging says "unlimited data" on the front and back, while the plan says "3GB of data", they could not explain that and told me to contact Amazon, then they dumped me off the chat without warning, which was so rude and unprofessional. Both chat experiences were bad. I did try calling one of the 80 countries and enjoyed the free call and text on that. But I would not recommend this company due to the above issues. I also reported them to Amazon, who said they would escalate the issue of false advertising. ... show more
Reviewed in the United States on February 20, 2024 by Len
    • Good
Size: 4GB
Good
Reviewed in the United States on July 17, 2026 by saw say
    • Separate the product from the service
Size: 4GB
Okay. I am going to review both the product and the service differently. The sim card is easily activated. You need to be in the US when you activate it. Inside the US, you will get a new phone number and wifi calling needs to be enabled through ultra Mobiles website. It wont work until you do. Now the hard part... the service..i took a vacation in Brazil. My phone worked literally only the first day; I started having issues right after the phone restarted. The problem is that literally every place that i am at (except very close to the airport) is considered to be roaming. If this is the case for you, youll need to go to their website and add international roaming credits for it to work. The current rate is 25 cents usd a minute for talk, and 2 cents per texts. I'm not entirely sure on the data rate....but they do have a support number to call, and they can help you fix issues. Keep in mind, just because you have internet that does not mean you can make calls. Just because you can make calls doesn't mean you have Internet. You need to actually check the coverage maps of wherever you are going and make sure to have roaming credits because you'll never really know when it's needed. To get my phone working in brazil (i have an android), i needed to go to settings, mobile data, then select the SIM card and make sure that the carrier setting was at auto select. This didnt work until i tried to connect to a non functioning network and it tood me to enable automatic registration..after that, the only issues I have are related to my coverage area. 5 stars for the sim. 3 stars for the service.. I wouldn't have gotten my phone to work without having a technical background. ... show more
Reviewed in the United States on October 20, 2024 by venom104
    • straight forward. reliable, pre-paid service
Size: 4GB
straight forward. service is reliable
Reviewed in the United States on July 7, 2026 by casey
    • Solid prepaid option with good value
Size: 8GB
I purchased the Ultra Mobile Prepaid SIM Kit (8GB, 1-Month Plan) and overall it’s been a good experience. The 8GB of data is enough for normal use like browsing, social media, and messaging, and call quality has been clear with no noticeable drops. The only downside is that data can run out quickly if you stream a lot, so this plan is best for light to moderate users. Otherwise, for the price, it’s a great prepaid option with no contracts. ... show more
Reviewed in the United States on January 10, 2026 by rojani
    • Funciona en Venezuela. SMS a veces lento
Size: 4GB
Al instalar la SIM Ultra Mobile como SIM #2 en el celular Xiaomi, en ajustes (settings) aparece T-Mobile. Ultra Mobile es un Mobile Virtual Network Operator (MVNO) que compra y revende cobertura T-Mobile. El 1 de mayo 2024 T-Mobile compró a Ultra Mobile. Compré la SIM con 3GB por $19 mensuales y lo utilicé tres semanas en Texas, Florida, Panamá y Venezuela para llamadas telefónicas, mensajitos, data, WhatsApp etc. En Venezuela, sí recibo mensajitos de claves de bancos, incluyendo BofA y familiares. Con roaming, probé llamanado a USA estando en Panamá y Venezuela. Funciona, pero mejor llamar WhatsApp via WiFi que no tiene costo. A fin de reducir la mensualidad, al vencer el mes, cambié el plan mensual de 3 GB $19 al mínimo, $15 mensual. Al hacer un solo pago de $120 por un año, hay descuento que equivale a precio de $10 mensuales. Ofrecen seis planes. Determine el conveniente según el uso que le va a dar. T-Mobile es mucho más costoso. En Venezuela, Ultra Mobile trabaja con partners Movistar y Digitel, por tanto, nótese que como cualquier celular en Venezuela, depende de la cobertura y congestión del operador local. A veces los mensajitos tardan en llegar a Venezuela, dependiendo de la hora del día. Encuentro que entrando y saliendo de modo avión en el teléfono, y también mensajitos en la app de Google Messages en la computadora con Windows 11, mensajitos parecieran llegar más rápido. Ultra Mobile es buena solución para cobertura internacional, Venezuela incluida. ... show more
Reviewed in the United States on May 13, 2024 by GGS Engineering

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