Steam may ask you to confirm a phone number when setting up the Steam Mobile Authenticator, updating account security details, or using certain features. A temporary number may help you receive the one-time SMS code when accepted. You only pay when the code arrives.
Simple Process
Steam may send an SMS when you add a phone number, set up or transfer the Mobile Authenticator, or confirm certain account changes. When a code is sent, you can view it in your MrSMS dashboard.
Select a country from the widget above and copy the temporary number you receive. Include the country code when entering it in Steam. If one country's number isn't accepted, you can try another at no charge.
Go to Steam → Settings → Account → Add a phone number, or follow the prompt when Steam requests phone confirmation. Paste in the virtual number and submit. Steam will send a confirmation code via SMS.
Codes often arrive shortly after delivery is initiated, though timing varies by carrier. Enter the code in Steam to confirm the number. You are only charged once the code successfully arrives.
Why MrSMS
Steam Guard uses your phone for security codes. Here's what makes MrSMS a practical option for the initial setup step.
Some users prefer not to attach their personal phone number to their Steam account. A temporary number keeps your personal SIM separate from that verification session.
Steam's SMS delivery varies by country and carrier. If one country doesn't deliver a code, switching to another is instant. You're only charged on success, so trying another option costs nothing.
Some services charge when a number is assigned. With MrSMS, you're only charged after the verification SMS is successfully received. If no code arrives, your balance is untouched.
When adding a phone number to Steam, a virtual number may work for receiving the one-time confirmation code. After setup, consider switching to the Steam Mobile Authenticator for ongoing account security.
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Choose a country, receive a temporary number, and view your Steam verification code directly in your MrSMS dashboard. No technical setup is required.
Use Cases
There are several situations where people prefer not to use their personal number for Steam phone verification.
Steam Guard SMS requires a phone number to send security codes. A temporary number can be used to receive the initial confirmation code during setup, keeping your personal phone number separate from your Steam account.
Developers and approved testers may use a separate account for testing game builds or integrations, subject to Steam's rules. A virtual number can complete the phone verification step without using a personal SIM.
Steam's SMS delivery varies by carrier and region. In some areas, local carriers may not reliably deliver Steam's verification messages. A virtual number from a different available country may help complete the step in these cases.
Steam lets users add a phone number through Settings → Account. A temporary number may work for receiving the one-time confirmation code during this step, subject to Steam's current rules and carrier availability.
Coverage
These are commonly used countries on MrSMS for Steam SMS verification.
Complete Guide
Steam uses phone numbers primarily for Steam Guard — a security feature that sends a verification code to your phone when you log in from a new device or browser. This is designed to protect accounts from unauthorized access.
Adding a phone number to your Steam account is optional but recommended by Valve for account security. It is part of setting up the Steam Mobile Authenticator — trade and Market hold periods depend on Steam's current authenticator and account-security rules, not the phone number alone. Some users prefer not to attach their personal phone number to their Steam account, making a virtual number a practical alternative for the initial setup step.
The process for adding a phone number to Steam is straightforward.
Steam Guard primarily uses email or the Mobile Authenticator app for login verification — not SMS. The phone number is used when setting up or transferring the Mobile Authenticator, for account recovery, and for certain security changes.
The Steam Mobile Authenticator is built into the Steam mobile app and generates time-based codes independently. A virtual number can be used for the initial confirmation step while setting up the authenticator, but Steam may use the same number again later for recovery or transfers.
Steam's SMS delivery varies by carrier and region. Check the current country list above for available options.
If no code arrives, wait until the cancellation option becomes available, then cancel the number and try a different country. You're only charged when the code successfully arrives.
After completing phone verification, setting up the Steam Mobile Authenticator is the most effective next step for account security. The authenticator generates codes independently of your phone number, so it remains reliable even if the virtual number is no longer available.
Also confirm your email address is current and enable Steam's email notifications for account activity. Together, email and the Mobile Authenticator give you reliable recovery options that don't depend on a phone number.
Once your phone number is confirmed in Steam, consider these steps to protect your account long-term. Set up the Steam Mobile Authenticator if you haven't already — this reduces your reliance on SMS for security codes. Review your Steam Guard settings in Settings → Account to confirm the current method.
If you plan to trade items on the Steam Community Market, note that Valve applies holding periods to trades and market listings based on account security settings. Check Steam's current policies for details on how phone verification affects these periods.
FAQ
Answers to the questions people ask before trying MrSMS for Steam.
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