How to Receive Bank Verification Codes While Traveling Abroad (Without Roaming)

You're in Barcelona. The tapas were great. Now you need to pay your credit card bill through your bank's app. You open the app, enter your password, and the bank sends a verification code to your phone number.

Your US phone number. Which is on an iPhone sitting in a drawer 5,000 miles away, because you switched to a local Spanish SIM the day you landed.

The verification code arrives on a phone you can't see. Your bank thinks you're ignoring it. After three failed attempts, your account is temporarily locked. You spend 45 minutes on hold with international customer service — at roaming rates — trying to convince a call center in Ohio that you are, in fact, you.

This happens to millions of travelers every year. And it's completely preventable.

The Problem: Your Bank Doesn't Know You Travel

Banks and financial services send verification codes to the phone number on file. They don't care that you're in another country. They don't check if your phone has signal. They just send the SMS and assume you'll get it.

Here's when you get locked out:

And it's not just banks. Coinbase, PayPal, Venmo, Amazon, Google — every service that uses SMS 2FA becomes inaccessible when you can't receive texts on your home number.

The Solution: Leave an Old iPhone at Home as an SMS Relay

The concept is simple and elegant:

Bank sends OTP → Your home phone number
                        ↓
              Old iPhone at home (on Wi-Fi + charger)
                        ↓
              SMS to Email Forwarder
                        ↓
              Your email (accessible anywhere)
                        ↓
              You read the code in Barcelona
              and log into your bank ✅
      

What You Need

1. An old iPhone (iPhone 7 or newer, iOS 17+) — the one sitting in your drawer
2. Your home SIM card inserted in it (or eSIM activated)
3. Wi-Fi connection at home (or wherever you leave the phone)
4. A charger — the phone stays plugged in 24/7
5. SMS to Email Forwarder installed

Setup (Do This BEFORE You Leave)

Step 1: Prepare the Old iPhone

1. Insert your home SIM card into the old iPhone
2. Connect it to your home Wi-Fi
3. Plug it into a charger in a place where it won't be disturbed
4. Disable everything except essentials: turn off Bluetooth, turn off Background App Refresh for all apps except SMS to Email Forwarder

Step 2: Install and Configure

1. Download SMS to Email Forwarder on the old iPhone
2. Enter your personal email address (the one you check on your travel phone)
3. Complete the Shortcuts setup
4. Test it: have a friend send a text to your home number → verify it arrives in your email

Step 3: Travel With Your Main Phone

Take your main phone with you. Use a local SIM or travel eSIM for data and calls abroad. Your home number stays active on the relay phone at home, silently forwarding every SMS to your email.

Step 4: Verify From Abroad

When you land, send yourself a test text to your home number (using a free SMS service or ask someone back home). Confirm the forwarded email arrives on your travel phone.

Real Scenarios

Scenario 1: Paying Bills from Southeast Asia

You're backpacking through Thailand for 3 months. Your mortgage autopay failed because your bank card expired. You need to log into your bank to update the card.

Without relay: Bank sends SMS to your US number. You can't receive it. You call international customer service at 3 AM Thai time. They put you on hold for 40 minutes. You finally update the card the next day after an international call that cost $15.

With relay: Bank sends SMS → arrives in your email in 10 seconds. You enter the code, update your card, done. Total time: 90 seconds. Cost: $0.

Scenario 2: The Crypto Emergency

Bitcoin hits your target price while you're on vacation in Greece. You need to log into Coinbase NOW and sell. Coinbase sends SMS verification.

Without relay: Code goes to your US number on the airport phone you left at home. You watch the price drop $2,000 while you scramble to find Wi-Fi calling that might work (it won't — Coinbase sends short codes that don't work with VoIP).

With relay: Code arrives in your email. You log in, execute the trade, and go back to your ouzo. Elapsed time: 30 seconds.

Scenario 3: Emergency Fund Access

You're in Colombia and your wallet is stolen. You need to transfer money from savings to a local account via Wise/Western Union. Both require SMS verification.

Without relay: You're stuck. No phone number access = no money transfer = no cash in a foreign country.

With relay: Codes arrive in email. You transfer money from a café. Crisis over in 15 minutes.

The Long-Trip Setup: Optimizing for Months Abroad

If you're traveling for more than a few weeks, optimize the relay phone:

Battery and Power

• Use a UPS or smart plug to protect against power outages
• Enable Low Power Mode permanently — reduces battery cycling
• Turn off all unnecessary features: Bluetooth, AirDrop, Location Services
• Remove all apps except SMS to Email Forwarder and Settings

Network Reliability

• Connect to your home Wi-Fi with auto-join enabled
• If the relay phone loses Wi-Fi, the app's offline queue stores messages and delivers them when connectivity returns
• Consider a backup: if your home internet goes down, you can tether to a neighbor's phone or use a mobile hotspot (ask a trusted person at home)

Monitoring the Relay

• Periodically send a test text to your home number to verify the relay is working
• Ask a trusted person at home to check that the relay phone is still charged and connected (maybe once a week)
• If the phone reboots, the Shortcuts automation restarts automatically — no manual intervention needed

SIM Card Considerations

Alternatives (and Why They're Worse)

The relay phone approach is the only solution that works 100% of the time — because the phone is sitting at home, connected to Wi-Fi, on a charger, receiving SMS exactly as it would if you were standing next to it.

The Checklist: Before You Leave for the Airport

• [ ] Old iPhone charged and plugged in at home
• [ ] Home SIM card inserted and receiving texts
• [ ] Wi-Fi connected with auto-join
• [ ] SMS to Email Forwarder installed and configured
• [ ] Shortcuts automation set up and tested
• [ ] Test text sent and received via email
• [ ] Trusted person at home briefed (optional but recommended)
• [ ] SIM plan active and not expiring during your trip
• [ ] Travel eSIM or local SIM ready for your main phone

Never Get Locked Out Again

The relay phone doesn't care what time zone you're in. It doesn't care about roaming agreements or carrier restrictions. It sits quietly at home, doing one thing: receiving your texts and putting them in your email.

Your bank codes arrive. Your 2FA works. Your accounts stay accessible. All for the cost of an old iPhone you already own, plugged into a charger you already have, connected to Wi-Fi you already pay for.

Set it up before your next trip. You'll forget it's even there — until the moment you need a code, and it's already in your inbox.

Related: forward old SIM texts to email | share 2FA codes with your team

Travel the world without losing access to your accounts.

Download SMS to Email Forwarder — turn any old iPhone into an SMS relay station.