Does the Nomad eSIM allow regular phone calls?

Nomad eSIM, the data-only travel SIM, does not support traditional voice calls or SMS over cellular. It provides data only, so voice calls have to happen through an app like WhatsApp, FaceTime, Signal, Skype-equivalent VoIP, or a browser dialer over the Nomad data connection. Nomad does not assign a phone number to the eSIM, which means no one can call you on it directly. For receiving SMS-based 2FA codes from US banks, this is a known problem; the workaround is keeping a US-based number through Google Voice, US Mobile, or Tello on a second eSIM slot. Most modern iPhones and Pixel phones can run two eSIMs simultaneously.

Do any travel eSIMs allow actual voice calling, not just data?

Very few. Most travel eSIMs (Airalo, Holafly, Nomad, Saily, Ubigi) are data-only and route voice through apps. The exceptions that offer a real phone number with voice and SMS are US Mobile, Tello, Mint Mobile, Google Fi, and Truphone (for enterprise). These cost more, typically $15 to $35 a month versus $5 to $10 for data-only, and require activation while physically in their coverage country in some cases. For a digital nomad who needs reliable US calling and SMS reception, a US Mobile eSIM alongside an Airalo data eSIM is a common dual-SIM setup. For occasional outbound US calls only, a browser dialer beats maintaining a full US plan.

How do I receive a US bank SMS 2FA code abroad?

Keep an active US-based number that delivers SMS internationally. Google Voice receives SMS to any data-connected device worldwide when set up while physically in the US. Tello, US Mobile, and Mint Mobile prepaid plans (starting $5 to $10 a month) keep a US number live and SMS-reachable abroad. T-Mobile postpaid plans include international SMS in 215+ countries. Avoid Skype Number and Twilio numbers for bank 2FA; many banks now block SMS to known VoIP ranges, which means the code never arrives. If possible, switch the bank's 2FA from SMS to an authenticator app like Authy or Google Authenticator, which works over any data connection regardless of phone number.

Can my coworking space block VoIP calls without me knowing?

Yes. Some networks in Bali, Dubai, China, and parts of the Middle East block VoIP traffic at the firewall, and the symptoms look identical to bad WiFi: call setup fails, the connection drops after a few seconds, or audio is one-way. WhatsApp, FaceTime, and Zoom all use ports and protocols that network admins can block selectively. Browser-based calling through WorldDialer uses WebRTC over HTTPS on port 443, which most firewalls leave open because blocking it would break web browsing. If you suspect VoIP blocking, test with WhatsApp first; if WhatsApp fails but web pages load, the network is filtering. Switch to a mobile hotspot from your phone or move to a cafe.

Digital Nomad Guide: Staying Connected to US Services

You're in Bali. It's 10pm. And you just realized you need to call the IRS before tomorrow's deadline. Good luck finding a VoIP app that works on hotel WiFi at midnight.

Digital nomads face a calling problem most guides ignore: US businesses keep US hours. Calling from Asia or Europe often means late nights or early mornings. And when you finally get the timing right, your Skype call drops because the coworking space WiFi can't handle it.

Here's how to actually make those calls happen.

The Time Zone Reality

US business hours (9am-5pm Eastern) hit at inconvenient times when you're abroad. From Bali, that's 9pm to 5am. From Bangkok, 8pm to 4am. Hope you're a night owl.

City	Time vs EST	Best Calling Window
Lisbon	+5 hours	2pm-6pm local
Mexico City	-1 hour	8am-5pm local
Bangkok	+12 hours	8pm-midnight local
Bali	+13 hours	9pm-1am local

Mexico City nomads have it easy - normal business hours overlap almost perfectly. Everyone else? You're calling during dinner, after drinks, or instead of sleep.

The IRS doesn't care about your sunset yoga schedule. Neither does your bank's fraud department.

What You'll Actually Need to Call

Banks, the IRS, Social Security, and insurance companies top the list of US services nomads need to reach. It's the unglamorous side of location independence - adulting from abroad.

Banking: Your card got flagged for fraud because you're suddenly buying coffee in Portugal. Or you need a new card shipped to your current address (good luck explaining that one). Or you're locked out of your account because two-factor authentication is texting a number you no longer have.

Taxes: The IRS has questions. You have FBAR filing requirements. Your accountant needs you to verify something. The deadline is tomorrow.

Insurance: Your travel insurance claim needs follow-up. Your health insurance wants to know why you're in a different country than last month.

These calls aren't optional. They're the price of the nomad life.

The Toll-Free Problem

Here's something that catches most people off guard: US toll-free 1-800 numbers typically don't work from abroad.

They're either blocked entirely or routed through at international rates - the opposite of "free." Companies block international calls because they don't want to pay the routing costs. That's why the number on the back of your credit card often just... doesn't work... when you're overseas.

You need the international number - the direct line that isn't toll-free. Most companies have one, but they don't exactly advertise it.

The Numbers You Need

Here are the international customer service numbers that actually work from abroad. Bookmark this.

US Government

Agency	Number	Hours (ET)
IRS International	+1 (267) 941-1000	M-F 6am-11pm
Social Security	+1 (410) 965-0160	M-F 9am-4pm

These aren't toll-free, which is exactly why they work.

Major US Banks

Bank	International Number
Bank of America	+1 (315) 724-4022
Chase	+1 (512) 623-7702
Wells Fargo	+1 (925) 825-7600
Citibank	+1 (210) 677-3789

Call these instead of the 1-800 numbers on your card. They're staffed to handle international callers.

Why VoIP Apps Fail Digital Nomads

VoIP apps depend on stable WiFi - something many coworking spaces and hotels can't guarantee.

You're on hold with your bank. Twenty minutes in. The WiFi dips. Call drops. Start over.

Beyond connectivity, there's the app fatigue problem. You already have 47 apps on your phone. Do you really want to download another one, create another account, configure another payment method, just to make a call to your accountant?

And some hotel and coworking networks actively block VoIP traffic. Firewalls treat it as suspicious. Your fancy VoIP subscription is worthless if the packets can't get through.

A Simpler Approach

Browser-based calling skips the app download entirely. Open a browser, enter the number, make the call.

World Dialer works this way. No app to download or maintain. Works on your laptop, phone, or tablet - whatever you're carrying that day. At $0.04/minute, even a 30-minute IRS hold only costs $1.20. No subscription required, no monthly fees for a call you make three times a year.

For digital nomads who call US numbers occasionally - not daily, but when it matters - this approach makes more sense than maintaining yet another app or paying for a subscription you'll barely use.

Skip the Runaround

That's it. US toll-free numbers don't work abroad, but the international numbers do. Now you know which ones to call.

Need to make that call? WorldDialer works in your browser. $0.04/minute to any US landline. No subscription required, no app, no contract.

We'll be here next time you need us.

→ Try WorldDialer