Looking to buy a United States SIM card?

Reduce your mobile roaming rates by using an international SIM card when travelling in United States.


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Using your home phone network in the United States of America can work out to be expensive, so consider switching over to a local SIM card to take advantage of better deals and plans. The US has some of the best prepaid SIM cards available, with deals that could reduce your bills. You can buy 1GB of data from the leading telco provider in the US for as little as $10 (£7.61). So, whether you’re planning a quick break or a tour of America, check out the best SIM card options on finder UK.

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Telco providers in the United States

There are four main operators in the United States: Verizon, AT&T, T-Mobile and Sprint. All four operators go through a strict approval process before being allowed to operate, and each one competes with the others to offer the best deals. Their services have all been tried and tested by both locals and travellers, and can be trusted. According to OpenSignal’s network map, coverage is very good in the main towns and cities. It can suffer as you head out toward the desert areas or countryside regions.

About the telco operators in the US

All four operators offer prepaid SIM cards, and you can buy them from supermarkets, kiosks, drug stores and official outlets, as well as at international airports. 2G, 3G and 4G/LTE plans are available on all networks for some CDMA and unlocked GSM phones. You can buy a prepaid SIM card by showing your passport, and your telephone number is already active when you purchase it. To add credit, there are several kiosks around various towns and cities, and vouchers are stocked in most stores and supermarkets. Some carriers in the United States do allow you to purchase prepaid SIM cards but they have to be purchased with the handset as a package. Make sure you check the total price before purchasing, as they can work out to be expensive. Below, we have broken down each telco provider to highlight exactly what they can offer you during your stay in the US.


Verizon is the largest provider in the United States. It offers 2G, 3G and 4G/LTE services. It also offers both CDMA and GSM platforms, but check whether your device is compatible first, as only a limited number are supported on CDMA. Prepaid SIM cards can be purchased from official stores and approved resellers, and credit can be purchased from the same retailers and most supermarkets across America. Verizon has the largest number of subscribers in the US, along with the best coverage and best speeds.

Prepaid SIM cards and “pay-as-you-go” plans can be added to the SIM cards as long as your phone is compatible with Verizon’s service. If not, you will have to purchase a phone with the SIM card in order to use it in the States.

Its 4G/LTE-compatible SIM packs can be purchased for $49.99. This may sound like a lot, but it includes unlimited talk and SMS within the US, plus 2GB data. Credit can be purchased in the guise of “PIN cards” or “PIN codes” for anywhere between $15 and $150 from most stores and supermarkets across the country. Just look for the Verizon sign.

The following options are restricted to prepaid SIM packages that come with a Verizon smartphone. Prices vary depending on what smartphone you choose, but these deals are obviously much more expensive than just acquiring a SIM card.

The following data plans can be added (each valid for 30 days):

  • $40: 3GB
  • $50: 7GB
  • $60: 10GB
  • $80: Unlimited data

High-speed data can also be added:

500MB30 days
$15500MB1 week
$201GB1 month
$352GB2 months
$605GB2 months
$10010GB2 months

Verizon’s APN: internet /or/ vzwinternet, website: www.verizonwireless.com


AT&T is the second-largest operator and the largest GSM-based provider in America. It offers 2G, 3G and 4G/LTE services. Prepaid SIM cards can be purchased from official stores and approved resellers, and credit can be purchased from the same retailers and most supermarkets across America. AT&T “GoPhone” prepaid SIM cards can be picked up for free, but packages must be added to use them.

There are two prepaid plans available: one includes data, voice and SMS while the other is a data-only SIM card for modems and tablets.

Credit can be added in many different denominations between $15 and $100, valid between 90 and 365 days.

The following voice and data plans are available:

$30Unlimited in USData charged at $2 per MB or 250MB for $5
$35Unlimited in US1GB included
$45Unlimited (to Mexico and Canada included)6GB included
$65Unlimited (to Mexico and Canada included)Unlimited US data

There are also $1-per-day data add-on packs that can be purchased, valid per calendar day.

The following data-only packs are also available

$252GB500MB for $10 add-on available
$505GB1GB for $10 add-on available
$758GB2GB for $10 add-on available

AT&T’s APN for smartphones: phone, APN for modem, routers and tablets: broadband

Website: www.att.com


T-Mobile US is catching up with both Verizon and AT&T. Its plans are very popular with the younger audience, and it offers better prices than its competitors. Prepaid SIM cards come labeled as “activation kits” with a SIM card, detailed information about how to set it up in both Spanish and English, and/or a smartphone. SIM cards can be purchased for $25, but they have only $3 of credit. Dial *611 from a T-Mobile phone to activate. Credit can be purchased from most stores or supermarkets from $10 up to $200. Prepaid SIM cards are valid for 90 days after credit is added.

The following data packs can be added to prepaid SIM cards:

  • $5: 500MB for 1 day
  • $10: 1GB for 7 days

There are also monthly prepaid plans available:

$45Unlimited dataUnlimited cap: 4GB
$55Unlimited dataUnlimited cap: 6GB
$75Unlimited dataUnlimited cap: 30GB

There are also the following data-only SIM plans available:

$5500MB1 day
$101GB7 days
$303GB30 days
$405GB30 days
$507GB30 days
$1005GB150 days

The following data packs can also be added; they renew automatically after 30 days:

  • $20: 2GB
  • $35: 6GB
  • $50: 10GB
  • $65: 14GB
  • $80: 18GB
  • $95: 22GB

T-Mobile’s APN: epc.t-mobile.com, and website: www.t-mobile.com


Sprint is the smallest operator but has some good deals available. It offers 2G, 3G and 4G/LTE services. Prepaid SIM cards can be purchased from official stores and approved resellers, and credit can be purchased from the same retailers and most supermarkets across America. The only catch here, though, is that you must buy a prepaid SIM card pack, which comes with a smartphone. Prices vary depending on which phone you select, but this makes these SIM card packages extremely expensive. We therefore suggest you choose one of the other providers mentioned, as they offer better services and better deals. However, if you do find a better deal on this network, then go ahead and use it because it be trusted.

Sprint’s APN: cinet.spcs, and website: https://www.sprint.com/

Some top tips from finder UK staff:

  • Locals call a SIM card a “SIM” or “chip”.
  • Ask the sellers to set up the SIM for you, because they will know how to do it. If not, follow the instructions we’ve highlighted above or go to the official operator website to seek advice.
  • Remember, it’s always better to get things done early, before the shops get too busy. That way you’re more likely to receive better assistance and avoid the crowds!

TripAdvisor tips for the best SIM cards and where to buy them

While it’s well known for reviews, booking hotels, flights and holidays, TripAdvisor also has many user comments that can help guide you through what SIM cards have been tried and tested in the US.

Here are some top tips from TripAdvisor users:

“What I do is use a standard AT&T SIM card in my phone, and it gives me all the features I want. As long as your iPhone is unlocked, you’ll be perfectly OK.”

“The prepaid phones are everywhere, the drugstore/pharmacies will have a selection IE CVS, RiteAid, Walgreens. You may find a RadioShack not too far from your stay and they usually have a better selection.”

“I have a $2 per day plan with T-Mobile. I bought a SIM card, it was $25 but $15 went toward the prepaid plan so it ended up costing only $10 for the activation of the SIM card. The plan is talk-text-data unlimited. This is very good cost wise.”

Pros and cons of the top telco providers in the US

All networks require you to have a SIM-unlocked, GSM-compatible international phone (or CDMA if you plan on using those services). To double check you have this phone, or whether it’s possible to unlock your device, contact your provider before you leave.


  • Good value for money
  • The United States has good coverage
  • Prepaid credit when required
  • No in-store contract needed
  • Could be compatible with your current phone
  • Cheap handsets are sold in stores


  • Most providers only offer prepaid SIM cards with devices, which pushes up the price
  • Can only be used on SIM-unlocked GSM phones or unlocked CDMA devices
  • Signal can suffer in the desert or far-flung regions

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2 Responses

  1. Default Gravatar
    arthurDecember 23, 2018

    I live between the UK and USA. I’m wondering what US provider offers the best plan so i can have good amount of data and unlimited calls in both the UK and USA. Thank you!

    • Avatarfinder Customer Care
      JoshuaDecember 24, 2018Staff

      Hi Arthur,

      Thanks for getting in touch with finder. I hope all is well with you. :)

      If you’re looking for a package with a good amount of data, you would need to compare the offers of each telco. Depending on your budget, each telco provides their own unlimited data package that comes with calls. Since I’m not completely familiar with your situation, it would be a good idea to review this page, check each telco’s offer, and from there, you can make the best decision.

      I hope this helps. Should you have further questions, please don’t hesitate to reach us out again.

      Have a wonderful day!


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