UpaSip Phone
SIP softphone for iPhone — voice, video and several lines, on your own phone system.
What it does
- HD voice and video calls over Wi‑Fi or mobile data, with the native iPhone call screen (CallKit).
- Incoming calls wake the app with push notifications, even when it’s closed.
- Several SIP accounts registered at once; pick which line to call from.
- UDP, TCP and TLS; keypad tones (DTMF); mute, speaker, hold; call history.
- Works with Asterisk, FreeSWITCH and standard SIP providers. No ads, no tracking.
Getting started
You need a SIP account from your PBX or VoIP provider. In the app open Settings → Add Account and enter:
- SIP Server – your PBX host name or IP address
- Port – usually
5060 - Extension and Password – your SIP login (tap the eye icon to check the password)
- Transport – UDP unless your provider says TCP or TLS
Tap Add & Connect. A green dot and “Connected” mean you’re ready to call. Add more accounts the same way; the keypad lets you choose which one to call from.
Troubleshooting
The account shows “Failed”
Check the server, extension and password with your provider. “Failed to authenticate” almost always means a wrong password or extension.
I don’t receive calls when the app is closed
Allow notifications for UpaSip Phone, and make sure your phone system is set up to trigger the push gateway for your extension. The Push Gateway section in Settings shows whether your device is synced.
Calls connect but there is no sound
This is usually a network/NAT setting on the phone system: it must allow RTP audio ports and advertise its public address. Allow microphone access for the app in iOS Settings.
Video calls show no picture
Both sides need video enabled and a common video codec (H.264 or VP8). Allow camera access for the app in iOS Settings.
Contact support
Questions or problems? Email us and we usually answer within one business day.