Need Extra Mobile Data in the USA? How a Second eSIM Can Help

Quick answer: You don't have to be visiting the United States to use a US eSIM. If your monthly high-speed data has run out, your carrier has poor coverage or your home internet is down, a separate prepaid eSIM can provide temporary mobile data. On a compatible, unlocked phone, you can usually keep your existing number and cellular plan while using an Astaroam US eSIM for data.

Used up your high-speed data before the billing cycle ends?

Some US phone plans slow down after you reach a high-speed data threshold. Others charge for additional data. If you still have days to go before your allowance resets, a separate prepaid eSIM is worth comparing with your carrier's add-on options.

With an Astaroam United States eSIM, you choose a package and use it as your phone's cellular data connection. You don't need to cancel your regular line or move your phone number. Check the price, allowance, validity and network before you buy.

Three more reasons to have a second data line

Coverage away from your usual spots. A carrier that works well at home may struggle at a vacation rental, worksite or rural destination. A backup eSIM using another supported network can give you another option, though it can't create coverage where no network has signal.

A carrier outage. If your main network has a problem, an unaffected alternative network could keep essential internet-based services available. Two lines on the same underlying network won't offer the same protection.

Home internet interruptions. If your cable or fiber connection goes down, your phone's hotspot can connect a laptop or tablet over cellular data. Check the amount of data you'll need, especially for video meetings.

Keep your number while using a prepaid data eSIM

Many recent eSIM-compatible phones can use two SIM lines together. You can generally keep your regular line selected for calls and SMS while choosing the Astaroam eSIM for cellular data. This doesn't cancel your carrier account or move your existing number.

WhatsApp and other internet-based apps can work over the new data connection while retaining their existing accounts. For iMessage, FaceTime and verification texts, make sure the relevant number and SIM settings are still correct. Charges from your main carrier can still apply to services used on that line.

Data-only or calls and texts? Astaroam has data-only packages and may offer selected US packages that include calls and SMS. Don't assume a new number is included: check the individual plan's inclusions, number details and allowances before ordering.

Choose a network that adds useful coverage

AT&T, Verizon and T-Mobile are the three major nationwide US mobile networks. Smaller brands often use one of these networks: Cricket uses AT&T, Visible uses Verizon and Mint Mobile uses T-Mobile.

If you want an eSIM as a backup for poor signal or an outage, check which underlying network your current carrier uses and compare it with the networks listed for your chosen Astaroam package. Network access can vary by plan. The FCC National Broadband Map can help you research reported mobile coverage, but it doesn't guarantee a signal at a particular address or indoors.

How to get connected

1. Check your phone. It must support eSIM and be carrier-unlocked. Our compatibility guide can help.
2. Pick a US package. Visit the Astaroam US eSIM page and review the supported network, data, duration and any calling or texting inclusions.
3. Install over Wi-Fi. Astaroam sends installation details by email. On iPhone, go to Settings → Cellular → Add eSIM. On Samsung, look for Settings → Connections → SIM manager → Add eSIM. Exact menus vary.
4. Set the data line. Choose the new eSIM for cellular data, keeping your regular line for calls and texts if your device supports that setup.
5. Check connection settings. Follow the package instructions for data roaming or APN configuration, then test the connection.

See the Astaroam installation guide for more help. Check when the package validity starts before installing; it may not start at the same moment the eSIM is added to your phone.

How much extra data should you buy?

Actual usage varies widely. Streaming, large downloads, automatic backups and video calls can burn through a small allowance. If a package is described as unlimited, review its full-speed allowance and any reduced-speed fair-use terms.

What Astaroam offers for temporary US data

Astaroam provides prepaid US eSIM options purchased online, with installation details sent by email. Packages vary by allowance, duration, supported network and features. Hotspot sharing is supported on Astaroam plans, subject to device and network conditions, and selected packages may offer calls and SMS where stated.

You can use a separate data eSIM without signing up for another traditional monthly mobile contract. As with any mobile service, confirm coverage, compatibility, activation rules and the package terms before purchasing. Refunds for unused eSIMs are subject to Astaroam's published policy.

Common questions

Can US residents use a US travel eSIM?

Yes. You don't need to be an international visitor. A US eSIM can also be useful for residents who need temporary data on a compatible, unlocked device.

Will I lose my phone number?

No. Adding a separate eSIM doesn't automatically change your number or cancel your regular plan. Keep your main line active for calls and texts on that number.

Does a backup eSIM work during every carrier outage?

No. It depends on the networks available to the package and whether those networks are functioning where you are. Check the supported network before buying.

Can I use it as a hotspot for my laptop?

Yes, with a compatible phone and usable mobile connection. Laptop usage can consume data quickly, so choose your allowance accordingly.

Is it better than buying extra data from my carrier?

Compare prices, network coverage, validity and high-speed allowances. A separate eSIM is another option, not automatically the cheapest or fastest one.

Get temporary mobile data in the United States

Browse Astaroam United States eSIM plans and choose the package that matches your data needs and location.

Packages and features change. Check the selected plan's coverage, allowances, activation rules, compatibility requirements and refund terms before ordering. Speeds and availability depend on local network conditions. Carrier and device names are for identification only; Astaroam is not affiliated with those companies.