Signal Verification on a Separate Number: What to Know Before You Register

Why does Signal still need a phone number?

Signal is built around privacy, yet it still registers every account to a phone number. When you install the app, Signal sends a verification code to that number, by SMS or by voice call, and the account is linked to it from then on.

What the number is used for has changed over time. Signal now offers usernames, so you can start a chat without giving out your number, and by default your number is no longer shown to people who do not already have it. A setting also lets you decide whether anyone can find you by your number at all.

The registration link itself has not gone away. When you move to a new phone or reinstall the app, Signal asks the same number for a new code. That one detail shapes every choice below.

Short-term test or long-term account? Decide before you register

Since Signal returns to the number whenever you register again, the right NumberFlare product depends on how long you need the account.

• Instant OTP fits a short-lived account: a developer checking how their product shares links into Signal, a journalist setting up a separate contact point for a single assignment, or anyone trying the app before committing. You get one SMS code, and the number is no longer yours after 20 minutes.
• A Cloud Number fits an account you will carry for years. The number stays yours while it renews, so a new phone or a fresh install never locks you out.

If you are unsure, picture the day you replace your phone. If losing the account that day would hurt, choose the Cloud Number.

Which countries can I use for a Signal code?

Instant OTP for Signal currently covers 198 countries, including Germany, Switzerland, Austria, the Netherlands, Sweden, Finland, Estonia, the United Kingdom, the United States, Canada, Ukraine, Poland, Brazil, India, Japan and Australia.

Signal works the same way whichever country the number comes from, and you can message people anywhere. The country still matters for one practical reason: it becomes the number your contacts may save for you. If friends and colleagues are mostly in one country, a number from there looks familiar to them. The dashboard shows the price for each country before you buy.

Steps to receive a Signal SMS code with Instant OTP

1. Register on NumberFlare with an email address and confirm it with the 6-digit code. For extra protection, switch on two-factor (TOTP) for your NumberFlare login.
2. Top up your wallet with a card or with USDT/USDC. Buying becomes available after the first top-up.
3. In Instant OTP, select Signal and a country, check the price, and confirm.
4. In Signal, pick the matching country and enter the number without the country code repeated.
5. Choose the text message option. Instant OTP is made for SMS codes, not voice calls.
6. Copy the code from the live inbox, usually there within a minute or two, and enter it in Signal.
7. Set a Signal PIN when the app asks for one.

The 20-minute window starts when you buy. You pay only if a code arrives; otherwise the amount is returned to your wallet automatically.

Signal code missing? Common causes

Most failed attempts come down to a handful of things:

• The country chosen in Signal does not match the number, so the SMS goes nowhere.
• The voice-call option was selected instead of SMS.
• The window was cut short. Codes can be slow, so wait the full 20 minutes.
• Too many requests in a row. Signal may pause sending to a number that asks repeatedly; wait before trying again.
• The number was refused. Signal, like many services, may not accept every virtual number. When that happens, Instant OTP refunds you and you can try another number later, or a different country.

Keeping Signal reachable: Cloud Number plus registration lock

For a Signal account you rely on, pair a number you control with Signal's own protections.

A Cloud Number starts from $1.95/month and remains yours while it renews. Its SMS inbox in the dashboard receives Signal's codes every time you register on a new device. Because Cloud Numbers also take calls in Chrome, Edge, Firefox or Safari, with voicemail and forwarding to your mobile, the voice-call code option works as a backup too.

Then turn on registration lock in Signal's settings. With it enabled, anyone trying to register your number on another device also needs your Signal PIN.

US, Canadian and Puerto Rico Cloud Numbers are instant and self-serve. Other countries are available on request: our team confirms availability and price and tells you if local rules call for an address or ID check before activation. Compare options on the pricing page.

Privacy is the point, so use it honestly

Keeping your personal mobile number out of a messaging app is a reasonable goal, and a second number is a sensible way to reach it. Signal's terms still apply. Register accounts for real people, keep to your own accounts, and do not use extra numbers to send unwanted messages or to impersonate someone. NumberFlare is not affiliated with Signal; Signal is a trademark of its owner.

Service names and logos are trademarks of their respective owners. NumberFlare is not affiliated with them. Use numbers lawfully and follow each service's terms.