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Sip:phone
What Sip:phone is
Sip:phone is a mobile client that connects Android and iOS devices to Sipwise Class 5 Softswitch and CPBX services over broadband data connections. It extends an existing business phone system, so subscribers can use mobile devices as extensions. The app is intended for operators using Sipwise NGCP who want a branded mobile client integrated with provisioning and billing workflows. Operators can customize its appearance and publish it under their own name in the Apple and Google app stores. Subscribers are activated on Sipwise C5 through an interface such as the web interface or REST API, then sign in with a username and password or scan a server-generated QR code. Calling includes audio and video, hold, two simultaneous calls, three-way conferences, and blind or attended transfers. Users can configure do not disturb, caller ID restriction, and ringing policy. Administrators can choose whether the desk phone or mobile app rings first, or set either one to ring alone. Contacts can sync with Sipwise C5 subscribers, with presence shown for favorite contacts. The app supports encrypted SIP communication and uses standard smartphone push notifications for incoming calls and notifications. A Sipwise server account is required; the app is not designed for arbitrary SIP providers or deployments. Sipwise offers a demo app for non-production evaluation and directs buyers to Sales for pricing and licensing.
Who it suits
Sip:phone suits operators using Sipwise NGCP who want to offer a branded mobile extension to an existing business phone system. Businesses need a compatible Sipwise server account and C5 or CPBX subscribers for the app to work.
What it does well
- Audio and video calls, conferences, and call transfers
- Operators can customize and publish the app under their name
- Administrators can configure desk phone and mobile ringing
- Contacts can sync with subscriber records and show presence
- Encrypted SIP communication is described
What to know first
- Requires an existing Sipwise server account
- Does not work properly with arbitrary SIP providers or deployments
- Not intended to place or support emergency calls
- Commercial licensing and pricing are handled through Sipwise Sales
Limits
The free App Store download requires an existing Sipwise server account. The commercial app requires a Sip:Phone App license in PRO/Carrier deployments and is unavailable in Community Edition; pricing is provided by Sipwise Sales.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| App Store download | Apple App Store listing; requires an existing sipwise.com server account | Free |
| sip:phone app | Commercial app; requires a Sipwise server account; pricing and licensing guidance available from Sipwise Sales | On request |
As sipwise.com lists them, read 11 Oct 2026. The maker's own page has the final word.
Getting started
- Contact Sipwise Sales for pricing, licensing, and deployment guidance
- Provision and activate subscribers on Sipwise C5 through its web interface or REST API
- Download the app from the Apple App Store or Google Play
- Sign in with a username and password or scan a server-generated QR code
- Request a Sipwise demo app to evaluate capabilities in a non-production environment
Verdict
Choose Sip:phone if you operate Sipwise NGCP and want subscribers to use Android or iOS devices as extensions of your business phone system. Look elsewhere if you need a client for arbitrary SIP services or emergency calling; commercial use also requires Sipwise licensing.
Questions
What does Sip:phone cost?
The commercial app's pricing is available from Sipwise Sales. The App Store download is listed as free and requires an existing sipwise.com server account.
Which platforms does it support?
Sip:phone is available for Android and iOS.
Can it work with any SIP provider?
No. It requires an existing account on a Sipwise server and does not work properly with arbitrary SIP providers or Sipwise deployments.
What does the app do for business calling?
It connects mobile devices to an existing business phone system as extensions, with audio and video calls, hold, conferences, and call transfers.
Can operators brand the app?
Yes. Operators can customize the interface and appearance and publish the app under their own name in the Apple and Google app stores.
Does Sip:phone support emergency calls?
No. The app is not intended or designed to place or support emergency calls, and using it as a default dialer may interfere with emergency dialing.
Facts from Sip:phone's own pages
- Account requirement
- The app requires an existing account on the Sipwise server and does not work properly with arbitrary SIP providers or Sipwise deployments. · play.google.com, 11 Oct 2026
- Branding
- Operators can customize the app’s interface and appearance and publish it under their own name in the Apple and Google app stores. · sipwise.com, 11 Oct 2026
- Business extension
- The app lets users use mobile devices as extensions of an existing business phone system. · sipwise.com, 11 Oct 2026
- Business use
- The app connects mobile devices to an existing core telephony system as extensions of a business phone system. · sipwise.com, 11 Oct 2026
- Call controls
- Users can configure subscriber features including do not disturb, caller ID restriction, and ringing policy from the app. · sipwise.com, 11 Oct 2026
- Call handling
- Features include audio and video calls, hold, two simultaneous calls, three-way conferences, and blind or attended call transfer. · sipwise.com, 11 Oct 2026
- Calling features
- The app supports audio and video calls, hold, two simultaneous calls, three-way conferences, and blind and attended transfer. · sipwise.com, 11 Oct 2026
- Company privacy
- Sipwise’s privacy policy says processing of personal data is in line with the GDPR and applicable country-specific data protection regulations. · sipwise.com, 11 Oct 2026
- Contacts and presence
- The app synchronizes phone contacts with Sipwise C5 subscribers and can show presence for users’ favorite contacts. · sipwise.com, 11 Oct 2026
- Demo
- Sipwise says operators can request a demo app to test its capabilities in a non-production environment. · sipwise.com, 11 Oct 2026
- Device ringing
- Operators can set policies for how calls ring on a subscriber’s desk phone and mobile app, including sequential or individual ringing. · sipwise.com, 11 Oct 2026
- Emergency calling limit
- The app listing says Sip:phone is not intended or designed to place or support emergency calls and that using it as a default dialer may interfere with emergency dialing. · play.google.com, 11 Oct 2026
- Founded
- 2008 · sipwise.com, 28 Sept 2026
- Headquarters
- Vienna, Austria · sipwise.com, 28 Sept 2026
- Intended customers
- Sipwise describes Sip:phone as a white-label mobile client for operators using its NGCP platform and integrating it into their provisioning and billing workflows. · sipwise.com, 11 Oct 2026
- Maker background
- Sipwise says it was founded in 2008 as an engineering company focused on next-generation network communications technology. · sipwise.com, 11 Oct 2026
- Network and codecs
- The app negotiates voice quality using codecs ranging from narrow-band to HD for the available access network. · sipwise.com, 11 Oct 2026
- Platform compatibility
- The app is available for iOS and Android and integrates with Sipwise C5 and CPBX subscribers. · sipwise.com, 11 Oct 2026
- Product limit
- Sipwise’s C5 feature list marks the Sip:phone app as unavailable in Community Edition and says the PRO/Carrier version requires a Sip:Phone App license. · sipwise.com, 11 Oct 2026
- Provisioning
- Subscribers are managed and activated on Sipwise C5 through interfaces such as its web interface or REST API, and users can sign in with a username and password or scan a server-generated QR code. · sipwise.com, 11 Oct 2026
- Purpose
- Sip:phone extends Sipwise Class 5 Softswitch and CPBX services to Android and iOS devices over broadband data connections. · sipwise.com, 11 Oct 2026
- Push notifications
- Sipwise C5’s Mobile Push Module uses the smartphone platform’s standard push notification framework to launch the app for incoming calls or notifications while aiming to reduce battery drain. · sipwise.com, 11 Oct 2026
- Ringing policy
- Administrators can configure whether the deskphone or mobile app rings first, or configure either device to ring alone. · sipwise.com, 11 Oct 2026
- Security
- The app listing describes encrypted SIP communication for secure calls. · play.google.com, 11 Oct 2026
Where Sip:phone stands on Freedom251
- Softphone and calling apps#27 of 33