MobileSphere

Empowering personalized communication everywhere.
Mobile number
plans
SLYNUMBER - the leading second mobile number app on the market.  

‍SLYFONE - the international counterpart, offering US mobile numbers to customers abroad.
encryption & vpn
SLYGUARD - the ultimate solution for safeguarding your digital communications.
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SLYTALK - state-of-the-art encryption technology for WhatsApp.
Ringless voicemail
slybroadcast - direct to voicemail messaging. One to many.

slydial - skip the call and go straight to voicemail. One to one.
Text messaging
slyText - send texts, photos, audio, and video to phone numbers from the web.

We believe that software is the force behind the advancement of mobile communication.

More than 100,000 companies internationally place their trust in us.

Using innovative AI tools and prioritizing people in our design, we’re establishing a new standard for connectivity - making each connection feel uniquely yours.

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Who we are

Founded in 2015, MobileSphere is a pioneer in the mobile communication and software space.

Innovation

Our track record of inventions, including patented ringless voicemail, speaks for itself.

Creativity

We combine out of the box thinking with dedication and hard work to achieve unique results.

User Experience

We deliver best-in-class user experience by listening to & acting on feedback.

Our products

We’re passionate about designing intuitive yet powerful solutions that make each interaction feel personal.

slybroadcast
Send pre-recorded audio messages directly to the voicemails of thousands of phone numbers at one time.
slydial
Connect your call directy to someone's voicemail-box & leave a message.
SLYNUMBER
A mobile app that provides you with a number that protects your privacy, and helps you maintain your
slyText
SlyText is a business text messaging service that enables two way communications from the web to any smartphone in the United States or Canada... and back!
SLYFONE
SLYFONE provides every user with a personal mobile number to activate and use WhatsApp and other services.
SLYTALK
With state-of-the-art encryption technology, SLYTALK ensures that every message, call, and video chat is kept private.
SLYGUARD
Private communications guaranteed over any app. SLYGUARD protects your privacy in an easy to use app. Use your favorite messaging app and SLYGUARD will protect your communication.