Sip:phone
Sip:phone is a mobile client that connects Android and iOS devices to Sipwise C5 and CPBX as extensions of an existing business phone system.
What Sip:phone is
Sip:phone is a mobile client that connects Android and iOS devices to Sipwise C5 and CPBX as extensions of an existing business phone system. It uses broadband connections and requires an account on a Sipwise server; it is not designed to work with arbitrary SIP providers or deployments. Operators can customize its interface and publish it under their own name, while subscribers can be provisioned through the C5 web interface or REST API and sign in with a password or a server-generated QR code.
The app supports audio and video calls, hold, two simultaneous calls, three-way conferences, and blind or attended transfers. Users can adjust options such as do not disturb, caller ID restriction, and ringing policy. Administrators can set whether desk phones or the mobile app ring first, or have either ring alone. Contacts can sync with C5 subscribers, with presence available for favorites. Sip:phone is paid, with pricing on request, and a free trial is listed. It is not intended for emergency calls.
Good
- Audio and video calling with transfers and conferences
- Operators can customize branding
- Contacts sync with C5 subscribers
- Supports Android and iOS
- Free trial is available
Watch out
- Requires an existing Sipwise server account
- Not intended for emergency calls
- Unavailable in Community Edition
- Commercial use requires a Sip:Phone App license
Who it suits
Sip:phone suits operators using Sipwise NGCP who want a branded mobile extension for their telephony service. It also fits business subscribers with an existing Sipwise server account who need calling and call-handling features on Android or iOS.
Verdict
Sip:phone brings business calling and configurable call handling to mobile devices connected to Sipwise C5 or CPBX. Check server compatibility and licensing with Sipwise Sales before choosing it.
Plans and prices
From Sip:phone's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| App Store download | Free | Apple App Store listing; requires an existing sipwise.com server account |
| sip:phone app | Priced on request | Commercial app; requires a Sipwise server account; pricing and licensing guidance available from Sipwise Sales |
The facts
Each one read from Sip:phone's own pages, with the date it was checked.
What it does
- Account requirement
- The app requires an existing account on the Sipwise server and does not work properly with arbitrary SIP providers or Sipwise deployments.checked 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.checked 11 Oct 2026
- Business extension
- The app lets users use mobile devices as extensions of an existing business phone system.checked 11 Oct 2026
- Business use
- The app connects mobile devices to an existing core telephony system as extensions of a business phone system.checked 11 Oct 2026
- Call controls
- Users can configure subscriber features including do not disturb, caller ID restriction, and ringing policy from the app.checked 11 Oct 2026
- Call handling
- Features include audio and video calls, hold, two simultaneous calls, three-way conferences, and blind or attended call transfer.checked 11 Oct 2026
- Calling features
- The app supports audio and video calls, hold, two simultaneous calls, three-way conferences, and blind and attended transfer.checked 11 Oct 2026
- Contacts and presence
- The app synchronizes phone contacts with Sipwise C5 subscribers and can show presence for users’ favorite contacts.checked 11 Oct 2026
- Demo
- Sipwise says operators can request a demo app to test its capabilities in a non-production environment.checked 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.checked 11 Oct 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.checked 11 Oct 2026
- Network and codecs
- The app negotiates voice quality using codecs ranging from narrow-band to HD for the available access network.checked 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.checked 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.checked 11 Oct 2026
- Purpose
- Sip:phone extends Sipwise Class 5 Softswitch and CPBX services to Android and iOS devices over broadband data connections.checked 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.checked 11 Oct 2026
- Ringing policy
- Administrators can configure whether the deskphone or mobile app rings first, or configure either device to ring alone.checked 11 Oct 2026
- Security
- The app listing describes encrypted SIP communication for secure calls.checked 11 Oct 2026
The company
- Company privacy
- Sipwise’s privacy policy says processing of personal data is in line with the GDPR and applicable country-specific data protection regulations.checked 11 Oct 2026
- Founded
- 2008checked 28 Sep 2026
- Headquarters
- Vienna, Austriachecked 28 Sep 2026
- Maker background
- Sipwise says it was founded in 2008 as an engineering company focused on next-generation network communications technology.checked 11 Oct 2026
Where it runs
- Device ringing
- Operators can set policies for how calls ring on a subscriber’s desk phone and mobile app, including sequential or individual ringing.checked 11 Oct 2026
- Platform compatibility
- The app is available for iOS and Android and integrates with Sipwise C5 and CPBX subscribers.checked 11 Oct 2026
Alternatives to Sip:phone
- 1
Siperb Mobile Softphone
Free planAndroidiOSWebAPI7.9From £2 a month - 2
Zoiper
Free planAndroidiOSLinuxmacOS7.3From €29.88 a year - 3
Bria Solo
Free planAndroidiOSmacOSWindows7.1From $35.40 a year - 4
SessionTalk Softphone
AndroidiOSWebmacOS7.0From $20 a month - 5
Phoner
AndroidiOSWeb6.9From $9.99 a month - 6
Aria
Free planAndroidiOSAPILinux6.8Free plan