The short version: To avoid getting stuck with SMS-based verification (one-time passcodes) from your bank, brokerage, or credit card while you're abroad, sort out three things before you leave: (1) decide how to keep your existing phone number active instead of cancelling it, (2) confirm that number can still receive SMS while you're overseas, and (3) arrange separate data connectivity for use at your destination. Whether a number can be kept, and the cost of doing so, depends on your plan and your provider, so always confirm the final details with your carrier's official information (this reflects general thinking as of June 2026). For the practical steps on actually receiving those messages overseas, see “How to receive SMS verification codes while abroad: getting ready so banking, brokerage, and cards don't trip you up.” It's worth a read alongside this guide.
Why preparing before you leave matters
Realizing only after you've arrived that “my SMS codes aren't coming through” or “my number no longer works” can leave you locked out of bank and brokerage logins or identity checks for your credit cards. Many of these services send a one-time passcode by SMS to the phone number you registered. If you cancel that number, or leave your phone running in a way that causes unexpected issues abroad, you risk losing the very number those verifications rely on. That's exactly why it helps to decide how you'll handle your number and SMS while you can still deal with it calmly — before departure.
First, understand how “phone number,” “SMS,” and “data” relate
These are easy to mix up, so let's clear it up first.
- Phone number and SMS: your mobile number and the short text messages sent to it. This is mainly what banks, brokerages, and card issuers use for verification.
- Data connectivity: your internet connection — used for maps, translation, apps, and so on. This plays a different role from SMS verification itself.
The key point is that “keeping your number and SMS” and “getting online at your destination” can be prepared separately. Some people choose to keep a number-bearing plan active while arranging cheaper local data separately with something like an eSIM. For the basics of handling numbers and SMS, the articles on phone numbers and SMS are a helpful companion read.
A pre-departure preparation checklist
Going through each of these before you travel will set your mind at ease.
- ☐ Check and update the phone number on file with your bank, brokerage, card issuers, and various apps
- ☐ Confirm the verification method for each (SMS, an authenticator app, or email)
- ☐ Decide how you'll keep your phone number active rather than cancel it (more below)
- ☐ Check your plan to confirm whether that number can still receive SMS abroad
- ☐ Organize your login IDs and passwords securely
- ☐ Arrange the data connectivity you'll use locally (eSIM, SIM, Wi-Fi, etc.)
- ☐ Note down family or emergency contacts
Even just running through this list once makes it clear what you'll actually need on the ground, and takes some of the worry away.
By situation: the main options for keeping your phone number
There are a few ways to think about retaining a number. Which one fits depends on how you use it and how long you'll be away, so treat these as general directions (confirm specific eligibility and pricing with your provider's latest information).
1. Keep your current plan as it is
This is a common choice for a long-term assignment or study abroad where you'll want the same number after you return. There's a monthly cost, but you may be able to keep both the number and SMS intact. Whether SMS can be received overseas varies by plan and settings, so check with your current provider to be sure.
2. Look into a lower-cost suspension or retention plan
Some providers offer plans that let you keep a number while reducing the cost. That said, whether SMS can still be received — and under what conditions — depends on the offering, so it's essential to check in advance for cases like “the number stays, but SMS can't be received.”
3. Rethink the verification method itself
Depending on the institution or app, you may be able to choose an alternative form of identity verification, such as an authenticator app instead of SMS. Confirming before you leave whether you can switch or use both means you won't be entirely dependent on SMS. Availability differs by provider, so always start from their official guidance.
What to consider when SMS “won't arrive”
Even with preparation, SMS may not come through at your destination. Don't panic — check the following points in order.
- Whether the plan for your number is still active (not cancelled or suspended)
- Whether that plan has overseas SMS reception enabled
- Your device's power, signal strength, and whether airplane mode is on or off
- Whether you're confusing SMS with notifications from apps that rely on data
- The possibility of a temporary delay on the sender's side (your bank, brokerage, or card company)
If that still doesn't resolve it, the reliable route is to contact support for the financial institution or app you registered with, or your carrier's official channels. Because the cause often relates to your plan's status, be careful not to cancel the number on your own judgment.
An important premise: travel eSIMs like Bloomy are “data-only”
This is a crucial point. Bloomy eSIM, like most eSIMs aimed at international travel and study abroad, is fundamentally data-only. It does not come with a phone number, and it can't, on its own, receive the SMS verification codes sent to your existing number. So the recommended division of roles is this: handle SMS verification on the side that keeps your home number active, and cover local internet access with a data eSIM. If you need a phone number, SMS, or voice calls, look into other options such as a number-bearing plan as well. Note that app-based messaging like WhatsApp can generally be used wherever you have a working data connection.
What Bloomy can do for you (preparing local data)
If your thinking is “I'll keep my home number, but I want to keep local data costs down,” a travel eSIM is one option. Bloomy eSIM is designed so you can choose a plan to match your destination, data allowance, and number of days, making it easy to compare even if it's your first time. Pricing and plan details may change, so please check the latest information shown at the time of purchase.
To find a plan for your destination, head to the eSIM comparison page and choose by country, data allowance, and number of days. For the practical steps on receiving SMS verification codes, see how to receive SMS verification codes while abroad, and for anything else, the FAQ is a good place to look.
In summary: prepare “number” and “data” separately before you go
Before an overseas assignment or study abroad, the thing to do isn't complicated setup — it's deciding up front how you'll retain your phone number and SMS. Plan to keep the number, confirm your verification methods, and arrange local data separately. Keep that separation in mind and you're far less likely to get stuck in bank, brokerage, or credit card procedures. Since the conditions and cost of keeping a number, and whether SMS can be received overseas, can all change, make your final checks against each provider's official information. Work through the list step by step and get yourself ready to leave with confidence.
Please note: actual connection quality varies with the local network, your device, and the specific area, and service is subject to a fair use policy.
