US Mobile eSIM: plans, the free trial and roaming abroad

What US Mobile plans were listed on 10 November 2026?

US Mobile is a prepaid, no-contract US carrier that sells service on three networks it calls Dark Star, Warp and Light Speed. It says together they cover all three major US networks, though the pages we read don't say which is which. Its plans page shows taxes and fees included in the price.

These were the US Mobile plans when we read it:

By the Gig is shared data. Extra lines are $8 each, and more data is $15 per extra 10GB. The monthly promotional prices were badged Flash Black Friday and applied to number transfers only, limited to five per household. A countdown on the page showed about two days left when we read it, but no calendar end date.

US Mobile says it has no multi-line discounts. Accounts with three or more lines on monthly Unlimited Premium get one subscription perk worth up to $15 a month. A Multi-Network add-on, which lets one phone use a second or third network, costs $10 a month per line or $90 a year on annual plans.

This is desk research from US Mobile's own pages. We have not bought or tested a US Mobile plan.

How does the US Mobile free trial eSIM work?

US Mobile offers a 30-day free trial to new customers who transfer an existing number to its Dark Star or Warp networks. The trial line gets 30GB of data and unlimited talk and text. Its get-started page also lists 5GB of hotspot data and says you can activate instantly by eSIM, in under five minutes, or buy a starter kit.

The conditions on that page:

• A valid credit card is needed to open the account, and autopay must stay on for the full 30 days.
• The line renews on Unlimited Premium. You can change plan up to two days before the trial ends.
• One trial line per new customer.
• If you want a new number rather than a transfer, the alternative was $45 for 90 days of Unlimited Starter, then $25 a month.

The get-started page also offered 50 percent off a starter kit with the code PROMOKIT, but did not show the kit's price. Its promotional wording for new lines differed from the plans page, which advertised $15 Starter for six months on a port-in. Check which offer applies at checkout.

Does US Mobile include international roaming?

Yes, on two plans, and as an add-on on others. US Mobile's international roaming page set it out like this:

Coverage depends on the network your line is on. The page listed 110+ destinations on Dark Star (30 of them data-only), 180+ on Light Speed and 125+ on Warp. Canada, Mexico and the United Kingdom were shown as popular destinations on all plans.

The monthly Unlimited Starter plan does not include roaming, so a monthly Starter user going abroad pays for an add-on. US Mobile says roaming is either included or prepaid, so there are no daily charges and nothing is billed after you return. Its FAQ says add-ons can be bought on Unlimited Flex, Starter, Premium and By the Gig across all networks. Another answer on the same page says the add-on option is available on Dark Star or Light Speed. We could not resolve which applies to Warp lines.

What about US Mobile international data eSIMs?

Separately from roaming, US Mobile sells international data eSIMs, which it says cover more than 140 countries. You buy one from the Add international data option in your account, pick a country and plan, and install the eSIM from the confirmation page. US Mobile's help centre says the plan expires 30 days after purchase. These eSIMs are data-only and do not support calling. We did not see their prices on the pages we read.

Is international calling included on US Mobile?

US Mobile says you can call 180+ destinations from the US. That is included on all annual plans, By the Gig and monthly Unlimited Premium, and available as an add-on on the Light and monthly Starter plans. If someone abroad is calling you, a US Mobile number is a normal US number, so they dial the US country code +1 first.

When is a travel eSIM cheaper than US Mobile roaming?

On Unlimited Premium, rarely: 20GB with calls and texts is already in the price. On other plans the add-on costs $15 for 1GB, and that is where a travel eSIM wins on data.

Our verified prices, read on each seller's own site in August 2026, put 5GB for 30 days in Japan at $10 with Nomad and $10.99 with Saily, and Airalo's 5GB over 7 days at $10. In France, Nomad's 5GB over 30 days was $9 and its 10GB $14. Those are less than the $15 1GB add-on, and well under the $30 5GB add-on.

The add-on has one advantage: it includes minutes and texts on your US number, which data-only eSIMs don't. A sensible split for a monthly Starter user is a travel eSIM for data, with the US Mobile line kept on Wi-Fi calling. Our cheapest eSIM table ranks plans by cost per gigabyte, and the Japan guide covers local options there.

Is US Mobile a good fit for visitors to the US?

Probably not for a short trip. The free trial requires transferring an existing number, and the pages we read did not say what a non-resident needs to sign up or whether non-US cards are accepted. A visitor wanting a US plan has simpler choices in our cheap US SIM card guide. For a US resident comparing carriers, US Mobile's Premium plan sits against the big networks' own plans; see the T-Mobile and Verizon guides, or the USA SIM card hub.