Unlimited data SIM cards in 2026: Verizon and T-Mobile 5G unlimited from $25/mo, no
Unlimited data SIM cards from $25/mo — same Verizon and T-Mobile 5G as the Big 3 at 60% less
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Quick Summary
Unlimited data SIM cards from MVNOs run on the same Verizon and T-Mobile towers as Big 3 unlimited plans. Visible: $25/mo unlimited on Verizon 5G. Mint Mobile: $30/mo unlimited on T-Mobile 5G paid upfront. Compare that with Verizon at $80/mo or T-Mobile at $70/mo for equivalent coverage. Same signal, $40-55/mo less per line.
Disclaimer: MoneySavingPro is a free price comparison service but we do not provide service directly. We do our best to keep all the information up to date but there may be some discrepancies between the price you pay.
Don't pay more for the same coverage
| 1 year | 2 years | 3 years | |
|---|---|---|---|
| Big Wireless | $900 | $1,800 | $2,700 |
| Alternative | $300 | $600 | $900 |
| You save | $600 | $1,200 | $1,800 |
Same coverage. Better service.
What real customers are saying
Verified reviews from Trustpilot
Tello (on T-Mobile)
“I travel to the USA a fair amount, having a dedicated US chip makes reservations, paying for parking and life in general easier. Tello are amazing, I buy an eSIM prior to leaving and it works wonders on arrival. I can even use it in the UK over WiFi to call and make reservations from the UK before I leave. It is the best circa £25 I spend while away — unlimited texts, calls and 50GB of data.”
PureTalk (on AT&T)
“Caitlyn was excellent at helping me through the process of selecting and ordering my next iPhone. Prices for plans are even better than when I first signed up 3 years ago, so even the non-promotional standard plan rates — contact them if you want to save money, which can help with the cost of the new phone.”
Red Pocket (on Verizon)
“I'm an older person that struggles with technology and I was able to get my account set up by following the instructions on the website. I love the service, it feels like I'm still on AT&T but paying less than half the price!”
T-Mobile
“Sketchy service, rude unintelligible customer service reps. When I switched back to Verizon they continued charging me. Avoid these scam artists.”
AT&T
“AT&T has to be the absolute worst company I've dealt with. My phone has constantly been on SOS only mode for days and I never had this issue. I call them to understand why and they all tell me the same thing — reset your network settings — and I'm telling them numerous times that I've tried that. I'm on the verge of switching over elsewhere.”
Verizon
“Spent 7 hours trying to establish service with them only to keep getting asked for more and more verification, which culminated in a phone call and a customer service rep who hung up on me! Worst customer service experience I've had in my life! Can you hear me now, Verizon?”
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Key Takeaways
- Prepaid unlimited SIM cards run on the same Verizon, T-Mobile, and AT&T towers as retail unlimited plans — at 40-70% less cost
- Visible is the cheapest unlimited prepaid SIM at $25/mo on Verizon's full 5G network — no deprioritization below 50GB monthly
- Mint Mobile unlimited runs $30/mo on T-Mobile 5G — paid 3 months upfront, the annual plan averages $30/mo
- Big 3 unlimited plans average $65-80/mo for a single line; prepaid unlimited starts at $25/mo on identical infrastructure
- eSIM activation is available from Visible, Mint, and US Mobile — no physical SIM, activate in minutes on any compatible device
Best prepaid unlimited data SIM cards in 2026
How to choose the best unlimited SIM plan
Which network do you prefer?
Low-cost carriers are powered by the same 5G and 4G LTE networks as the big 3. According to a 5G Experience Report (2023) by Opensignal, T-Mobile has the most extensive 5G coverage in the United States. If you have a preference for a specific network, you can find an MVNO that operates on that network. To discover the best cell phone service in your area, make sure to use our coverage checker.
How much data do you need?
Do you really need a prepaid SIM card for unlimited data? The big 3 wireless companies want you to believe so, but in reality, the average monthly cellular data consumption is around 10GB. Because if you spend most of your time at home or work on Wi-Fi, it's likely your cellular data usage will be much lower. You can pick a plan with enough data to fit your needs with cheap cell phone providers, meaning if you use less, you can pay less. But if you do choose an unlimited data SIM card, be aware that high-speed data is normally capped.
Is mobile hotspot data included?
Many MVNOs permit the usage of hotspot data. However, they impose restrictions on the quantity of data that can be used through tethering. The specific limit varies depending on the carrier and plan that you select. Additionally, some low-cost carriers provide exclusive data only SIM cards designed specifically for iPads, tablets, and mobile hotspots.
What's the monthly cost?
While an unlimited data SIM card with the big 3 wireless costs around $75-90 per month, the best MVNOs offer budget-friendly SIM cards, ranging from $5-35 per month without compromising coverage or data speeds. Watch out for hidden fees & taxes; some providers include these in the price, and others, such as Verizon and AT&T, don't.
How many lines do you need?
With big wireless, you only get the low advertised price if you buy four lines. With low-cost carriers, the price you see is what you pay, even for one line. Some MVNOs also offer further discounts for multi-line plans.
Can I bring my own phone or buy a new device?
While big wireless prioritizes keeping their customers in a perpetual cycle of phone upgrades, MVNOs advocate for bringing your own device. This empowers you to regain control and only switch phones when it's convenient for you. In the event that you do decide to buy a new phone, most MVNOs provide the option for 0% financing spread across 1-2 years.
Are there any promotions?
Promotions from big wireless can seem great at first. But once you read the fine print, it often leads to buying things you don't need and committing to 3-year phone contracts. Most MVNOs offer short-term introductory discounts for new customers, and their pricing is much clearer.
Are there any perks?
The big 3 wireless plans normally come with "complimentary" TV subscriptions, but these often become paid subscriptions that are automatically included on your bill after a few months. Although some budget-friendly carriers like US Mobile do provide plan choices with free subscription services, we generally advise keeping these subscriptions separate to avoid paying for unnecessary months of service.
What international travel features are available?
Most MVNOs offer free international calls to many countries. But when you're traveling abroad, there are different features you'll need, for example, roaming. If this is important to you, you can find a variety of carriers offering SIM cards for international travel.
Do they have parental controls?
Many MVNO carriers offer parental control features that enable parents to monitor their children's phone usage and data consumption. With parental controls, you can set data limits, restrict access to certain apps or websites, and even track your child's location. Some AT&T MVNOs offer these features as part of their standard plans, or you'll find this feature on your cell phone.
What are the SIM card sizes?
The SIM card you need will depend on your device. Most smart devices now use a nano-SIM or eSIM, but some older devices may need a micro-SIM or a standard SIM.
Check out our comparison of the best prepaid SIM cards to ensure you find the best deal.
Find the best cell phone service in your area
Compare the cheapest unlimited SIM plans
SIM cards for international travelers
In the quest for affordable and flexible communication, especially when traveling, prepaid SIM cards have become a pivotal part of helping to stay connected. For travelers jetting from the USA to Europe and other various countries, the GSM technology underlying most prepaid SIM cards ensures phone compatibility, catering to both iPhone, Android, and other smartphones.
Whether you're looking to buy a new SIM card on arrival or opt for a travel SIM card, either is a great option. Also, if your phone is compatible, an eSIM can make this process even easier.
However, your current carrier may offer international plans, but they usually come with a hefty price tag. The best option can be getting a local SIM card, which presents a cost-effective option, often providing a substantial GB of data, free mobile hotspot data, and local call minutes, which are invaluable for internet access to navigate via Google Maps or stay connected through WhatsApp and Skype.
A new SIM card can offer an ideal plan tailored for each destination and guarantee the best rates.
Unlimited SIM card FAQs
You can purchase a prepaid SIM card with unlimited data online or in major stores.
The best value prepaid SIM cards with unlimited data are available from Boost Mobile, Tello, and Mint Mobile. They have unlimited plans ranging from $25-30 per month.
Recap: What is the best unlimited data SIM card?
MVNOs offer cheap unlimited data plans for all cell phone needs.
These low-cost carriers can save you up to $600 a year without sacrificing 5G and 4G LTE wireless coverage.
How I choose the best carriers and plans
To select the best carriers and plans, I evaluated over 30 different carriers.
I rate carriers in five categories, with a star rating from 1-5, with 5 stars being the best. I then calculate the overall star rating using the five categories:
- Value for money: I compare carriers based on price, features, benefits, and promotions. It's not just about the lowest price but getting the most bang for your buck.
- Coverage: I look at network 5G and 4G LTE coverage across the US. I use coverage maps to determine service availability and data speeds in urban, suburban, and rural locations.
- Customer experience: I take into account items such as current user experience, website and app usability, ease of switching, and customer service in terms of availability, channels, and satisfaction ratings.
- Transparency: I assess whether carrier pricing is clear and straightforward. I examine the fine print to check for hidden fees, confusing terms or conditions, and misleading offers to ensure upfront, honest prices and advertising.
- Range of choice: I evaluate the diversity of plan options to determine if they fit the individual needs of all customers.
Read more about our carrier ratings methodology and our editorial process.
I regularly update the content so that we're always recommending the latest and best value plans and do my best to ensure the information is accurate.
Trusted by 50,000+ households
How we calculate these figures
$30M+ saved: Based on 10 years of savings tracked through MoneySavingPro since 2016. Calculated as: average annual saving per household × number of households who switched to a lower-cost carrier through our platform. Average saving based on typical Big 3 unlimited plan (~$75/mo) vs. average low cost carrier plan (~$25/mo) = $600/year per line.
50,000+ households helped: Reflects households who completed a carrier switch through MoneySavingPro since 2016, based on our platform conversion data.
30+ carriers reviewed: MoneySavingPro has independently reviewed and rated 30+ mobile carriers across coverage, pricing, contract terms, and Trustpilot customer satisfaction scores.
A low-cost carrier uses the same towers and coverage as major networks like Verizon, T-Mobile, and AT&T. The difference is that low-cost carriers offer more affordable plans with fewer hidden fees because they don’t have the same overhead costs as the big guys.
Low-cost carriers can keep prices lower because they don’t own the network infrastructure. They pay the major carriers for network access, which allows them to pass the savings on to you.
Yes. Most low-cost carriers offer flexible plans that allow you to adjust your data, talk, or text limits to suit your needs, as you are not tied into a contract. You can change your plan or cancel anytime.
You can bring your own unlocked phone to most low-cost carriers or purchase one directly from the carrier. Many low-cost carriers offer popular models, and their network compatibility is usually no issue.
Yes, switching to a low-cost carrier is simple. You can sign up online, bring your own phone, and port your number easily. The process is quick and straightforward, and customer support is available to assist with any issues.
No! Most low-cost carriers offer prepaid, no-contract plans, meaning you're not tied down to long-term commitments. You can switch whenever you like without paying hefty termination fees.
Most low-cost carriers offer easy payment options, including online billing, autopay, or prepaid options. Many also offer discounts for paying upfront or signing up for autopay.
Yes! Some low-cost carriers offer family plans or multi-line discounts. But just by signing up the whole family to a low-cost carrier without the discount could save you up to $600 a year, per line.
Yes, while the big 3 only offer unlimited data plans, most people actually don’t need these. You can choose a plan with a data limit that suits your usage to save even more money or an unlimited data plan. It's up to you.
Depending on the plan, normally, your speeds will be slowed until your next billing cycle, rarely do any charge for overage use. However, some low-cost carriers provide options for purchasing additional data at a reasonable cost.
No, low-cost carriers use the same towers as the big networks, so you’ll have the same signal strength and coverage as with Verizon, T-Mobile, or AT&T.
Yes, all low-cost carriers now offer 5G service, as they use the same networks as the big 3. You will need a compatible phone and plan, but 5G is increasingly available across low-cost carriers.
You may experience slower speeds during peak times if your low-cost carrier deprioritizes data. However, outside of busy periods, you should enjoy the same fast speeds as you would with major carriers. Your speeds will depend on the network’s traffic at any given moment.
No, low-cost carriers provide coverage in rural and remote areas, just like major networks. The coverage is essentially the same, as they all use the same towers and infrastructure.
While customer service experiences can vary, many low-cost carriers offer excellent customer support. They tend to focus on customer satisfaction and transparency without the frustration of endless hold times or high-pressure sales tactics often seen with the big carriers.
Yes, most low-cost carriers offer reliable customer support. It varies by carrier but you’ll find they offer online support or phone assistance.
Most low-cost carriers don’t have physical stores, so in-person support may be limited. However, most low-cost carriers offer strong online support or call center assistance to resolve issues remotely.
While low-cost carriers may not offer as many in-store support options as big carriers, they generally provide reliable and helpful customer support through phone and online channels. Their support tends to be more personal and straightforward compared to larger, more corporate carriers.
Customer support can assist with a wide range of issues, including billing inquiries, plan changes, technical issues, device troubleshooting, network connectivity problems, and account management.
Yes, you can keep both your current phone and phone number when switching to a low-cost carrier. The process is easy, and most low-cost carriers offer tools to help you through the transfer.
Yes, it’s quick and easy! Low-cost carriers typically allow you to sign up online, bring your own phone, and transfer your number. The process is simple, and customer support is available to guide you if needed.
In most cases, there should be minimal downtime during the switch. The porting process usually takes a few hours to complete, but you can often continue using your current service until the transfer is finalized. Make sure to complete the switch during business hours for faster processing.
You can check if your phone is compatible by looking up the low-cost carrier’s compatibility list on their website or using your IMEI number.
Many low-cost carriers offer device financing or discounts for purchasing a new phone through them. However, you're also free to bring your own unlocked phone giving you flexibility.
Some low-cost carriers offer international calling and roaming options, but it's important to check with the specific carrier for details. Some carriers may offer affordable add-ons for international calls and data.
Many low-cost carriers offer affordable international calling plans or add-ons to help keep costs down, but the exact rates can vary.
Yes, if your low-cost carrier supports international roaming, you can use your international calling plan while abroad. However, be sure to check roaming rates and coverage before you travel to avoid unexpected costs.
Yes, many low-cost carriers allow you to make international calls over Wi-Fi using apps like WhatsApp, Skype, or other VoIP services. This can be a cost-effective way to call internationally, as it doesn’t count toward your carrier's voice minutes or incur additional charges.
