Sign in Get started

Setting up a Linphone SIP account with a SMS Conecta number

Updated 2026-09-30 · By the SMS Conecta team (SMSConecta Inc.)

Short answer: Getting SMS Conecta working in Linphone means opening the assistant, picking the option for a third-party SIP account rather than creating a Linphone account, then entering your SIP username, password and the domain sip.smsconecta.com. Pick UDP, TCP or TLS transport, and Linphone registers your real number so it can place and receive calls.

Linphone is an open-source softphone for Android, iOS, Windows, macOS and Linux that specifically supports accounts from outside SIP providers. That makes it a solid choice if open-source software on both phone and computer appeals to you.

What you need first

  • A SMS Conecta number with its SIP credentials pulled from the dashboard.
  • Linphone, downloaded from the App Store, Google Play or linphone.org.
  • Permission granted for Linphone to use the microphone and, on mobile, to display notifications.

Linphone settings for SMS Conecta

SettingValue
SIP server / domain / registrarsip.smsconecta.com
Username / auth ID<SIP_USERNAME> (from the number's page in the dashboard)
Password<SIP_PASSWORD> (from the same page)
Transport and portUDP, TCP (5060) or TLS (5061), selected in the assistant
CodecsG.711 µ-law (PCMU) and A-law (PCMA)
AuthenticationSIP digest, per-number username + password
DTMFRFC 2833 (RTP events) or SIP INFO
Outbound proxyLeave empty

Step-by-step: connecting a third-party SIP account

  1. Open Linphone. The account assistant launches automatically on first start; later it can be reopened from the side menu or account settings.
  2. Pick the third-party SIP account option, which uses a SIP account from another provider, rather than the option that creates a Linphone account.
  3. Type <SIP_USERNAME> as the username and <SIP_PASSWORD> as the password.
  4. Type sip.smsconecta.com as the domain.
  5. The display name is optional; for transport, try UDP first and fall back to TCP or TLS if UDP doesn't work.
  6. Confirm the setup, then check the account's details to see it listed as connected or registered.
  7. Within audio codec settings, leave PCMU and PCMA turned on.

Why Linphone might be the right pick

Linphone's biggest draw is that it's open source and runs on every major platform, so the same interface follows you from an Android phone over to a Linux workstation. Developers and privacy-conscious users often favor it for exactly that transparency.

The catch is that its first-run assistant steers you toward creating a Linphone account. You don't actually need one. The third-party SIP route is the correct path for any outside provider, SMS Conecta included, and everything else in the app behaves identically from there.

Linphone also surfaces more network settings than most softphones do, things like STUN, ICE and a per-account transport choice. Leave these at their defaults initially, changing them only when the troubleshooting section below points you there. On desktop, set your preferred audio devices in the settings ahead of the first call so ringtone and call audio both go to the correct output.

Receiving calls

Once the account registers, calls to your number ring inside Linphone. On mobile, grant notification permission and exempt the app from aggressive battery optimization so it can wake up for incoming calls. Running Linphone on a desktop too means the newest registration generally wins inbound calls.

Outbound caller ID

Linphone routes calls through whichever account is marked default, so the caller ID shown is that account's SMS Conecta number. Add every number you own as its own account and flip the default when a different ID is needed.

Troubleshooting Linphone

  • Registration error 401/403: credentials don't line up. Re-enter the password exactly and double-check you selected the third-party SIP option, not a Linphone account login.
  • No audio in one or both directions: enable STUN/ICE under network settings, or change transport to TCP to sidestep NAT issues.
  • Call drops immediately after being answered: turn off wideband codecs while testing and keep only G.711 µ-law and A-law active.
  • Keypad tones go undetected: select RFC 2833 for the DTMF method, with SIP INFO as a backup.

Checking the setup end to end

Place a brief outbound call to your own mobile and confirm the caller ID reads your SMS Conecta number. Then hang up, lock your phone or minimize the desktop app, and call that SMS Conecta number back. If only the mobile side of this second test fails, background restrictions are the likely cause rather than the SIP settings themselves.

Last, reach an automated phone menu and press a digit. A response from the menu confirms DTMF is configured correctly and the account is ready for everyday use.

Frequently asked questions

Is a Linphone account required to use SMS Conecta?

No. Pick the third-party SIP account option and supply your SMS Conecta credentials; a Linphone account plays no part in that.

Does Linphone run on iPhone and Android?

Yes. Its official site lists both iOS and Android, alongside Windows, macOS and Linux desktop versions.

Which transport works best in Linphone?

UDP suits most networks. TCP or TLS on port 5061 helps in cases where UDP SIP traffic gets blocked or altered.

Why is Linphone missing calls on my phone?

The operating system is probably suspending the app. Turn on notifications and switch off battery optimization for Linphone.

Can several SMS Conecta numbers be added to Linphone?

Yes. Run through the third-party SIP account option once per number, then pick which one serves as default for outgoing calls.

Related pages

Sources