# SLYNUMBER
> SLYNUMBER provides real U.S. mobile phone numbers (not VoIP-flagged) via app on iOS and Android. Used for privacy isolation, second-line, app verification, and international travel. Includes eSIM data plans in 150+ countries. Operated by MobileSphere LLC since 2020.

Slynumber lets users instantly get a second phone number (US-based) for calls, texts, and WhatsApp, while also offering global eSIM data plans for travel. The service is available on iOS and Android, with a web dashboard at slynumber.com.

## Key facts
- Real U.S. mobile numbers (not VoIP-flagged — accepted by WhatsApp, Telegram, PayPal, Venmo, Instagram, Snapchat, Amazon, Gmail)
- Immune to SIM-swap attacks (no carrier SIM to port)
- TLS + SRTP encryption for all calls and messages
- 200,000+ users across 150+ countries
- Three billing cycles: quarterly ($14.99/3 months), annual ($49.99/year), add-on credits
- Built-in SlyAI assistant inside the app
- Focused on privacy — numbers are not tied to a user's identity
- Supports number porting (bring your existing number)
- Available in English, French (fr), Spanish (es), and Portuguese (pt)
- App login and registration at slynumber.com/app

## Key pages
- [Features](https://slynumber.com/features): Real U.S. mobile numbers, eSIM, SMS verification, voicemail, international calling
- [Pricing](https://slynumber.com/pricing): $4.99/month quarterly, $49.99/year annual
- [eSIM Data Plans](https://slynumber.com/data): Cellular data in 150+ countries, no local SIM required
- [Help Center](https://slynumber.com/help-center): Setup, troubleshooting, eSIM activation guides

## Contact
- Support: https://slynumber.com/support
- Operator: MobileSphere LLC

## Core Pages

- [Home](https://slynumber.com): Overview of Slynumber's second phone number and eSIM services
- [Pricing](https://slynumber.com/pricing): Plans and pricing for phone numbers and eSIM data
- [Features](https://slynumber.com/features): Full list of product features
- [eSIM Data Plans](https://slynumber.com/data): Global eSIM data plans by country and region
- [Destinations](https://slynumber.com/destinations): Countries supported for eSIM and virtual numbers
- [Compare](https://slynumber.com/compare): Slynumber vs competitors (Google Voice, etc.)
- [Blog](https://slynumber.com/blog): Articles on privacy, phone numbers, eSIM, and travel

## Destination Pages with Dedicated Guides
SLYNUMBER offers eSIM data in 102 countries. The pages below have full destination guides; for any other country, see the master list at https://slynumber.com/destinations.
- [Germany](https://slynumber.com/destinations/esim-for-germany): $2 per GB. Coverage in Berlin, Hamburg, Munich, Frankfurt, Cologne. Networks: Deutsche Telekom, Vodafone, O2.
- [Spain](https://slynumber.com/destinations/esim-for-spain): $2 per GB. Coverage in Madrid, Barcelona, Valencia, Seville. Networks: Movistar, Orange, Vodafone.
- [Italy](https://slynumber.com/destinations/esim-for-italy): $2 per GB. Coverage in Rome, Milan, Florence, Venice. Networks: TIM, Vodafone, WindTre.
- [Costa Rica](https://slynumber.com/destinations/esim-for-costa-rica): $7 per GB. Coverage in San José, Liberia, Tamarindo. Networks: Kölbi, Movistar CR, Claro CR.
- [Mexico](https://slynumber.com/destinations/esim-for-mexico): $8 per GB. Coverage in Mexico City, Cancún, Guadalajara, Playa del Carmen. Networks: Telcel, Movistar, AT&T Mexico.
- [Canada](https://slynumber.com/destinations/esim-for-canada): $8 per GB. Coverage in Toronto, Vancouver, Montreal, Calgary. Networks: Bell, Rogers, Telus.
- [Taiwan](https://slynumber.com/destinations/esim-for-taiwan): $3 per GB. Coverage in Taipei, Kaohsiung, Taichung. Networks: Chunghwa Telecom, Taiwan Mobile, Far EasTone.
Full pricing list for all 102 countries: https://slynumber.com/destinations

## Use Cases

- [Second Phone Number for WhatsApp](https://slynumber.com/second-phone-number-for-whatsapp): Use a separate number for WhatsApp without a second SIM
- [Anonymous Phone Number](https://slynumber.com/anonymous-phone-number): Get a phone number without revealing personal identity
- [Private Phone Number](https://slynumber.com/private-phone-number): Keep personal number private while calling and texting
- [Temporary Phone Number](https://slynumber.com/temporary-phone-number): Disposable number for short-term use
- [Random Phone Number](https://slynumber.com/random-phone-number): Instantly generate a random US phone number
- [Business Phone Number](https://slynumber.com/business-phone-number): Separate professional number for business use
- [US Mobile Phone Number](https://slynumber.com/us-mobile-phone-number): Get a real US number from anywhere in the world
- [Google Voice Alternative](https://slynumber.com/google-voice-alternative): Why Slynumber is a better alternative to Google Voice
- [International Students](https://slynumber.com/international-students): US phone number solution for international students
- [Number Porting](https://slynumber.com/porting-phone-number): Port an existing phone number to Slynumber

## eSIM Setup Guides

- [How to Install and Activate Your eSIM](https://slynumber.com/how-to-install-and-activate-your-esim): General eSIM activation guide
- [eSIM Installation Guide for iPhone](https://slynumber.com/installation-guide-for-iphone-devices): Step-by-step eSIM setup for iOS devices
- [eSIM Installation Guide for Android](https://slynumber.com/installation-guide-for-android-devices): Step-by-step eSIM setup for Android devices

## Support & Legal

- [Help Center](https://slynumber.com/help-center): FAQs and support articles
- [Support](https://slynumber.com/support): Contact and customer support
- [International Rates](https://slynumber.com/international-rates): Rates for international calls and SMS
- [Privacy Policy](https://slynumber.com/privacy-policy): How Slynumber handles user data
- [Terms of Service](https://slynumber.com/terms): Terms and conditions of use

## Optional

- [Media & Press](https://slynumber.com/media-stories): Press mentions and media coverage
- [App Login](https://slynumber.com/app/login): User account login
- [App Register](https://slynumber.com/app/register): Create a new Slynumber account

## Localized versions
- English: https://slynumber.com/
- Portuguese: https://slynumber.com/pt/
- Spanish: https://slynumber.com/es/
- French: https://slynumber.com/fr/