First month free when subscribing to an annual private number plan
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This is an example of a promotion that could suit this business. It is not a guaranteed active offer or a working discount code. Check the website for current deals.
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SLYNUMBER, a service of MobileSphere, provides real U.S. mobile phone numbers through a mobile app, without requiring a physical SIM card. The service is aimed at users who need a second phone number for privacy, personal separation, or verification purposes.
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About Mobile sphere
Starting price
From $4.99/month
Annual plan
$49.99/year
3-month plan
$14.99
Number type
Real U.S. mobile number (no SIM card required)
Platforms
iOS (App Store) and Android (Google Play)
eSIM data plans
Available as add-on, pay-as-you-go
Outbound credits included
$1 per month (private number plan)
Service name
SLYNUMBER by MobileSphere
SLYNUMBER positions itself in the digital telecom services segment, targeting consumers and small business users who require a legitimate, non-VoIP U.S. mobile number. Unlike providers such as Google Voice or Burner, which issue virtual numbers that are frequently rejected by financial apps and online platforms, SLYNUMBER issues numbers that pass mobile number checks at banks and services like Cash App and Zelle. The service sits in the budget-to-mid range, with plans starting at $4.99 per month, and adds optional eSIM data plans for users who need connectivity abroad. Privacy is a central pillar: the issued numbers are not linked to personal details and cannot be traced through reverse lookup tools.
Active promotions
Ready to use with your order at Mobile sphere.
Free eSIM data starter bundle included with a new number subscription
Example promotion
This is an example of a promotion that could suit this business. It is not a guaranteed active offer or a working discount code. Check the website for current deals.
To the shop
Mobile sphere in the news
Recent updates and background about Mobile sphere, summarised in our own words.
F1 Las Vegas Grand Prix to include concert series at T-Mobile Zone
The Las Vegas Formula 1 Grand Prix has announced a three-night concert series taking place at the T-Mobile Zone at Sphere. The addition expands the entertainment offering around the racing event. No further details about the performers or schedule were included in the announcement.
Backstreet Boys to headline post-race show at Sphere during Las Vegas Grand Prix
The Backstreet Boys have been confirmed as the headline act for the official post-race show connected to the Las Vegas Grand Prix, held at Sphere. The event is positioned as part of the broader entertainment program surrounding the race weekend. It represents one of the flagship live performances of the Grand Prix festivities.
Backstreet Boys set to perform at first F1 and Sphere combined event
The Backstreet Boys have been announced as performers at a show combining the Formula 1 Las Vegas Grand Prix with the Sphere venue. This marks the first time such a joint event has taken place. The performance is expected to draw attention from both motorsport and music fans.
Summaries by Image Review based on publicly available sources and our own editing. External links may contain affiliate links.
What others ask about Mobile sphere
Answers to the most common questions, based on search behaviour and our own research.
Is SLYNUMBER a reliable service?
SLYNUMBER is operated by MobileSphere and issues real U.S. mobile numbers, not VoIP numbers. The service is accepted by financial platforms such as Cash App and Zelle, where many virtual number providers are blocked.
What is the difference between SLYNUMBER and Google Voice or Burner?
Google Voice, Burner, and similar providers offer VoIP or virtual numbers, which are frequently rejected by banks, financial apps, and online verification services. SLYNUMBER issues real mobile numbers that pass those checks.
Can I use a SLYNUMBER number for bank verification or two-factor authentication?
Yes. The service is designed to work with financial services, OTP codes, and 2FA verifications. The numbers are real mobile lines, not VoIP, so they are accepted where virtual numbers are typically blocked.
How much does a second phone number from SLYNUMBER cost?
A private number is available on a 3-month plan for $14.99 or an annual plan for $49.99. An eSIM data add-on starts at $5.00 per year, and outbound credit bundles are available from $10.
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