Two Factor Authentication

Protect yourself from scammers and hackers by using a secondary phone number from SLYNUMBER for two-factor authentication across all your apps. It works to verify and activate online accounts like Amazon, Gmail, PayPal, Apple, Microsoft, and many more.

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SLYNUMBER has

Real numbers

Our numbers are real mobile numbers, not VoIP.

SLYNUMBER works for

Verification codes

Our numbers work for all app and service activations.

SLYNUMBER offers

eSIM Data

We offer mobile data with our eSIM feature.

Benefits of using a second
phone number for 2FA

With SLYNUMBER, there’s no need for SIM cards or burner phones. It’s the only second number provider that lets you activate apps requiring SMS verification, such as WhatsApp, PayPal, and popular social media platforms. Simply download the SLYNUMBER app on Android or iOS and start calling and texting right away.

Protection & Safety

Protect your privacy

Instead of putting your personal number out there to be vulnerable to spam calls and soliciting, use a second number for any online activity to activate apps and receive verification codes so that you are not bombarded with meaningless advertisements.

Protects you from data leaks

If you lose your phone or your SIM card is compromised, having a second number for 2FA codes can protect your accounts from being hacked into and adds an extra layer of security.

Simplifies account management

You can dedicate a second mobile number for all of your two-factor authentication. This not only helps consolidate and control access for business accounts but also makes it easier to recover accounts when you forget a password.

Offers fexibility

With a second phone number, you have the benefit of canceling anytime. Unlike other cell services, it is much easier to switch second numbers if you need to update or think your online accounts are at risk.

Discover our features

Uniuqe features

Whether you need a temporary mobile number or a permanent, anonymous number, SLYNUMBER has you covered with convenient services like call forwarding and call blocking, plus new features such as number blocking capabilities, voicemail with custom greetings, and AI capabilities.

Different pricing plans

SLYNUMBER offers various affordable pricing plans, all of which include unlimited inbound calls and inbound messaging, caller ID & spam blocking, a dedicated voicemail, and 100 outbound credits. There are plans to support either long or short-term purposes so that you get exactly what you need.

Better than the alternatives

Additionally, when you get a new phone number from SLYNUMBER, you can use that number for SMS verification without having to use an authenticator app like Authy, Google Authenticator, or TOTP Authenticator. In essence, you get security, privacy, and convenience in a single app.

Beyond 2FA

Not only is SLYNUMBER good for two-factor authentication and activating online accounts, but it is also a great way to keep your personal and professional life separate, protect your overall privacy, and maintain more control over your communication.

Benefits of using a second phone number for 2FA

With SLYNUMBER, skip SIM cards and burner phones. It’s the only second-number service that supports SMS verification for apps —just download the app on Android or iOS and start calling and texting instantly.

No roaming fees

Forget about roaming fees, use SLYNUMBER worldwide with just an internet connection or our latest eSIM technology.

Cell phone call quality

Experience clear, reliable communications with SLYNUMBER's cell phone call quality.

Video calls and video conferencing

SLYNUMBER provides real mobile numbers that are compatible with platforms like Zoom Phone and Microsoft Teams.

Pricing

Pricing plans

We're always transparent about our pricing. No hidden fees - ever! Purchase your second phone number online now!

Standard Plan (3-Month Base)

$4.99/mo

Total billed: $14.99

Upon purchasing this plan, the following items are included:

Unlimited inbound calls
Unlimited inbound texts
100 outbound credits per month
Choose plan
Annual Plan

$49.99/year

Upon purchasing this plan, the following items are included:

Unlimited inbound calls
Unlimited inbound texts
100 outbound credits per month
Choose plan
Add-on

Outbound
Credits

$10 for 1000 credits

This is a one-time purchase.

1 credit equals 1 text message
1 credit equals 1-min
phone call
+ Add
Learn more

SLYNUMBER: Phone Number for 2 Factor Authentication

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