There’s nothing quite like travelling in the United States. It’s a massive, incredibly diverse country. The non-stop action of New York City. The wide-open plains of Montana. Bubbling springs at Yellowstone, muscle-bound beaches in Miami, and much, much more.
For a country that leads the world in technology, though, the prepaid SIM card market for international visitors has long been surprisingly confusing, limited and expensive. With incompatible technologies between providers, locked phones, and post-paid plans the norm for locals, tourists have been poorly catered for.
Things have got slightly better in the last few years, although still a far cry from regions like South East Asia or even Western Europe. Still, you can now at least easily find a store, buy a SIM card that will work in your phone, pay a not-totally-unreasonable amount of money for a useful amount of calls, text and data, and get it all done in a few minutes. That’s a vast improvement.
- We recommend T-Mobile for most travellers
- Also consider AT&T if you're spending time in more remote areas
There are four main cell service providers in the United States — but only two of them are of much interest to travellers.
Verizon (which has one of the largest networks) and Sprint use CDMA technology that’s incompatible with almost any phone not sold by them. Unless you’re planning to buy a phone specifically for your time in the US, you’re out of luck with those two.
Of the other two companies, AT&T has the largest (and often, most congested) network, offering coverage throughout most of the continental United States (map). It’s a big country, though. If you’re planning on road-tripping through lightly-populated states like Nebraska, Montana and a few others, you’ll still hit some very large dead spots.
T-Mobile has less coverage in rural areas (map), with particularly large gaps in Idaho, Nevada, Oregon, Montana, New Mexico and eastern California. On the upside, when you do have signal, data speeds will often be reasonably fast.
There are several resellers of service on both networks — and none are particularly great. Prices are typically only slightly less than buying direct from the provider, often with data speed limits, poor customer service and purchasing difficulties for overseas visitors without a local address or credit card.
With my six week trip to the US largely confined to the cities, coverage areas weren’t going to be a problem with either provider. I intended to buy from AT&T, but after encountering an unhelpful salesperson in a Seattle store, decided to go for T-Mobile instead. Pricing and data allowances were slightly better, and in-store service was fast and efficient.
Note that very few international phones will get LTE service with either company, as the US uses different frequencies to most countries outside North America. To complicate things further, both AT&T and T-Mobile use “4G’ to describe what the rest of the world knows as “HSPA+” or 3.5G. As a result, you’ll likely see 4G on your phone screen, but it’s not LTE!
Offering prepaid SIM cards at international airports doesn’t seem to have caught on in the US. I’ve flown into several in the country, and don’t recall seeing marked kiosks or signage at any of them. Fortunately, T-Mobile stores are quite common in large cities, and even smaller places should have at least one store.
I walked into a retail store in Seattle’s Capitol Hill, asked about prices, and walked out with an activated SIM card in under ten minutes. It had cut-outs for both micro and nano sizes. The process was simple — confirm you’ve got an unlocked phone, specify the plan you’d like, and hand over the money. You’ll get a receipt with your phone number printed on it.
It might be worth putting the SIM in your phone and confirming it works straight away. I didn’t have any problems, but am always a little nervous when I don’t see the card working in my phone before leaving the store.
While you shouldn’t expect any real bargains on prepaid cell service in the US, prices have dropped a little from last time I was in the country.
Note: for extra bonus confusion, you often can’t get the same deals in-store that you can online, with either company. Since most international visitors will be buying their SIM from a store, I’ve focused on those options — but if you have a US shipping address you can use, it’s worth checking out the online-only plans as well.
Unlimited calls and texts are common on most plans. AT&T’s prepaid monthly smartphone plans started at $45, with 2Gb of data. T-Mobile charged $40 for 3GB of data, $50/5GB or $60/10Gb. I went with the cheapest option.
At both the AT&T and T-Mobile stores I visited, the SIM card itself was free. This isn’t always the case, however, so definitely check before committing.
Don’t forget, you’ll pay sales tax on top of the quoted price, ranging from nothing to nearly 10% depending on which state you’re in at the time.
Note: T-Mobile doesn’t offer any prepaid data-only plan instore. AT&T does — but only for tablets. If you happen to mention you’ll be using it in a phone, they won’t sell it to you! I’ve read reports of problems activating an AT&T data-only SIM in a phone as well, so don’t necessarily expect it to work if that’s what you want to do.
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You can top-up your T-Mobile account online, using just your phone number and a credit or debit card. Since international cards work with this method, it’s probably the easiest way to do it.
Failing that, any T-Mobile store will be able to help you out, as well as authorised retailers. You can check locations here.
COVERAGE AND DATA SPEEDS
As mentioned above, T-Mobile coverage is good in most large towns and cities, but drops away in rural areas, with large dead zones in several states. Compare the service map to your intended destinations, and if you’re going to be spending significant time driving or staying in places without signal, consider AT&T instead.
“4G” speeds in central Seattle were good, with strong signal both inside and outdoors. Voice calls were clear, and SMS delivery was reliable.