A US phone number is often the first thing a US bank, broker, fintech or payment app asks for. It is also the first place things go wrong for non-residents. Many services check what type of number you give them. If it looks like an internet (VoIP) number, sign-up fails or the 2FA code never arrives.
This guide explains the two kinds of US numbers, compares the cheapest options as of September 2026, and suggests setups that hold up well over time. Each option has its own detailed guide, linked below.
Carrier number vs VoIP number
| Real carrier number (SIM / eSIM) | VoIP number (app) | |
|---|---|---|
| Examples | Ultra Mobile, Tello, US Mobile, Mint | Google Voice, TextNow, Talkatone, Hushed |
| How it works | A mobile line on T-Mobile, AT&T or Verizon | Numbers issued to an internet calling service |
| Bank / fintech 2FA | Usually accepted | Often rejected |
| Cost | About $3–10/month | Free to about $5/month |
| Works abroad | Via Wi-Fi Calling or roaming | Anywhere with internet |
| Main risk | Losing the line if you miss payments | Number reclaimed after inactivity; rejected by apps |
Banks and apps can look up a number's line type in real time. Services such as Twilio Lookup label numbers mobile, landline, fixedVoip or nonFixedVoip, and many sign-up flows simply block the VoIP categories. Venmo is a well-known example: it reportedly does not accept Google Voice numbers. For anything involving money, use a real carrier number.
Options at a glance
Prices are as of September 2026 and change often. Confirm them on each official site before you buy.
| Option | Type | Approx. cost | Main catch |
|---|---|---|---|
| Ultra Mobile PayGo | Carrier (T-Mobile) | $3 / 30 days | Line cancelled 60 days after last payment. Reports vary on eSIM and activating from abroad |
| Tello | Carrier (T-Mobile) | From $5/month | Activating from abroad is reportedly restricted |
| US Mobile | Carrier (3 networks) | From about $10/month | Roaming only works if you activated the line in the US |
| H2O Wireless | Carrier (AT&T) | From about $10/month | Roaming needs an unlimited plan |
| Mint Mobile | Carrier (T-Mobile) | From $15/month (prepaid for several months) | Prices rise at renewal |
| Google Fi | Carrier (T-Mobile) | $20/month + data | Needs a US address; data suspended after long stays abroad |
| Google Voice | VoIP | Free | Needs an existing US number to set up |
| TextNow / Talkatone | VoIP | Free with ads | Frequent outgoing activity required |
| Hushed | VoIP | $4.99/month | Paid VoIP, still VoIP |
Postpaid lines from the big carriers (AT&T, Verizon, T-Mobile postpaid) usually need US credit checks and a US address. They are not covered here.
Recommended setups
1. Cheapest reliable number for 2FA
Ultra Mobile PayGo + Wi-Fi Calling. At $3 per 30 days it is the lowest-cost real carrier line we found. Turn on Wi-Fi Calling and SMS codes reach you over any internet connection, without roaming charges. See Ultra Mobile PayGo.
2. Easier online sign-up, more flexibility
Tello or US Mobile. Both sell eSIMs online. US Mobile includes international roaming on some plans, but only for lines activated inside the US. See US Mobile and Tello.
3. Carrier number + free VoIP backup
Ultra PayGo (or Tello) + Google Voice. Use the carrier number to set up Google Voice. Then give Google Voice to low-risk services (newsletters, deliveries, forums) and keep the carrier number for banks. If one number has a problem, you still have the other. See Google Voice and VoIP numbers.
4. Visiting the US for a trip
Keep your home SIM for calls and add a data-only travel eSIM. It costs a few dollars for a short trip, but it comes with no phone number. See Travel eSIM for the USA.
What to check before you buy
- Phone compatibility. Use an unlocked phone. US-sold iPhone 14 and later models are eSIM-only. Many phones sold elsewhere take one physical SIM plus one eSIM, so a US line and your home line can run side by side.
- Payment. Reports vary on whether foreign cards work. Some users have succeeded with foreign Visa/Mastercard, others had to use PayPal. Have a backup payment method ready.
- Service address. Carriers usually ask for a US address or ZIP code for emergency (E911) and tax purposes. Do not invent someone else's address. If a plan truly requires US residency, choose a different plan.
- Activation location. Some carriers restrict activation from outside the US or disable roaming on lines activated abroad. Read each guide before paying.
- Keep-alive rules. Every option has an inactivity or non-payment rule. Put a recurring reminder in your calendar.
Keep-alive routine (monthly, 5 minutes)
- Check that the plan renewed and your balance covers the next cycle.
- Send one outgoing text from the carrier number and from any VoIP number (VoIP apps mainly count outgoing activity).
- Confirm Wi-Fi Calling is still on after phone updates.
- Once a quarter, trigger a real 2FA code from your bank and make sure it arrives.
FAQ
Can I get a US number without being in the US? Usually yes. Some carriers sell eSIMs or SIM kits online. Rules on activating from abroad vary by carrier and change often, so check the specific guide.
Is Google Voice enough for banking? Often not. Many financial apps reject VoIP numbers. Use it as a secondary number.
Do I need a US address? Most prepaid carriers ask for a US ZIP code or service address. Google Fi explicitly requires a valid US address. Use legitimate information only.
Will I pay roaming fees to receive codes abroad? Not if the code arrives over Wi-Fi Calling. See Receiving SMS abroad with Wi-Fi Calling.
Follow the telecom and network rules of the country you live in.
Sources
- https://www.ultramobile.com/paygo/
- https://tello.com/
- https://www.usmobile.com/plans
- https://www.h2owireless.com/
- https://www.mintmobile.com/plans/
- https://fi.google.com/about/plans
- https://support.google.com/voice/answer/115061
- https://www.twilio.com/docs/lookup/v2-api/line-type-intelligence
- https://support.apple.com/en-us/118669
