Our Products

slyText

slyText

Send texts, photos, audio and video to phone numbers from the web.

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slyFone

Slyfone

Your global mobile number.

Slyfone provides every user with a personal mobile number to activate and use WhatsApp and other services.

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slyDial slyDial

slydial

Connect your call directy to someone's voicemail-box & leave a message.

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slyBroadcast

slybroadcast

Send pre-recorded audio messages directly to the voicemails of thousands of phone numbers at one time. Ringless voicemail personalized.

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Private communications guaranteed over any app. SLYGuard protects your privacy in an easy to use app.

SLYGuard
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riffr
riffr

Riffr

Share micro-podcasts with your followers and listen to others'. The social network powered by audio.

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Some of our Customers

Who We Are

History

Founded in 2003, MobileSphere is a pioneer in mobile communication and software. In 2004 The company launched CellularLD -- among the first VoIP over mobile service -- targeting MVNOs and end-users. In 2008 MobileSphere launched slydial, its patented ringless voicemail technology.

Since then we have continued to innovate with our range of patented mobile communications products: slybroadcast, slyText & Slyfone. In 2020, we launched Riffr - a social (micro) podcast platform.

The company's core belief is that software is the engine that will power mobile communication.

Our Values

Innovation

Innovation

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

Creativity

Creativity

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

User Experience

User Experience

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

Latest News

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Robocallers Try New Tactics to Evade Crackdowns

PEW, November 30 2021

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Why a Boston company wants to encrypt your WhatsApp messages

BostInno, November 18 2021

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Riffr, an Audio Social Media Platform, Announces Launch

PR News, March 5 2019

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