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Setting up Groundwire SIP on iPhone and Android

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

Short answer: Getting Groundwire running on iPhone starts with adding a new generic SIP account, then entering your SMS Conecta SIP username, password and the domain sip.smsconecta.com. Turn on push notifications so calls come through even with the app closed, keep G.711 codecs active, and your real number is ready on your iPhone.

Groundwire, from Acrobits, is a SIP softphone for iOS and Android sold as a one-time purchase. The vendor's documentation says both versions support push notifications and background calling, which matters especially on iPhone, where apps get suspended fast.

What you need first

  • A SMS Conecta number with its SIP credentials, found on that number's page.
  • Groundwire, downloaded from the App Store or Google Play.
  • Notification and microphone access granted to Groundwire.

Groundwire 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 or TCP 5060, TLS 5061
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: adding the account

  1. Open Groundwire and head into its account settings.
  2. Select add an account and choose the generic SIP account type instead of a provider template.
  3. Give it a title, then enter <SIP_USERNAME> as the username and <SIP_PASSWORD> as the password.
  4. Enter sip.smsconecta.com as the domain.
  5. Within the account's advanced options, set the transport (UDP, TCP or TLS on 5061) and confirm G.711 µ-law and A-law are permitted.
  6. Switch on push-notification-based incoming calls within the account's incoming-call options.
  7. Save, then check the registration indicator shown on the dialpad screen.

Why iPhone users lean toward Groundwire

Most SIP apps struggle on iPhone since iOS restricts what an app can do while in the background. Push support is Groundwire's headline feature: rather than keeping a connection open constantly, a notification wakes the app when a call comes in, saving battery while keeping your SMS Conecta number reachable.

It's also sold as a one-time purchase according to Acrobits, something many people prefer over a subscription. Setup is identical on Android, so a mixed household or team can run the same app across both platforms.

Verify push works properly once setup is done: fully close the app, lock the phone, and call your SMS Conecta number from a separate line. A ring means you're set. If nothing happens, recheck the push option inside the account, the notification permission under iOS Settings, and any Focus mode that might be silencing calls from apps.

Receiving calls on iPhone

iOS suspends apps running in the background, so a normal registration stops receiving calls shortly after you step away from the app. Groundwire's push mode keeps the number reachable instead: calls show up as a native call screen even when the app isn't currently open. If push doesn't cooperate in your setup, forward calls from the SMS Conecta dashboard to another phone as a backup.

Outbound caller ID

Calls placed through Groundwire show your SMS Conecta number as caller ID, tied to whichever account made the call. With more than one number added, pick the account on the dialpad before calling, and dial the full international number starting with the country code.

Troubleshooting Groundwire

  • Registration fails with 401 or 403: re-enter username and password, and verify the domain reads sip.smsconecta.com.
  • Audio works in only one direction or not at all: try TCP transport and enable STUN/ICE under the account's network options; mobile carrier NAT causes this often.
  • Calls connect but then drop or go silent: restrict codecs to PCMU and PCMA to rule out a mismatch.
  • Voice menus ignore keypad input: pick RFC 2833 for DTMF, with SIP INFO as a fallback.
  • No incoming calls while the app is closed: verify push is turned on for the account and that iOS notifications are permitted.

Battery, data and call quality

With push turned on, Groundwire has no need for a constant connection while idle, which helps battery life. During an actual call, G.711 consumes roughly the same modest bandwidth whether on Wi-Fi or mobile data, so a weak signal matters more than the codec does.

For the cleanest audio, favor Wi-Fi at home or the office and keep the phone's Low Data Mode switched off during calls. If audio turns choppy while moving between Wi-Fi and mobile data, finish the call on one network before switching to the other.

Frequently asked questions

Is Groundwire available on iPhone?

Yes. Acrobits lists Groundwire as available for both iOS and Android.

Will calls still reach me with Groundwire closed?

The vendor states Groundwire supports push notifications and background calling; turn on push for the account so incoming calls can get through.

Does Groundwire require a subscription?

Acrobits describes it as a one-time purchase. Your SMS Conecta number already includes its SIP credentials.

Can Groundwire be used over mobile data?

Yes, SIP works fine over either Wi-Fi or mobile data. If audio quality suffers on mobile data, try TCP transport and turn on STUN.

Can I keep my regular mobile number alongside Groundwire?

Yes. Groundwire adds your SMS Conecta number on top of your SIM number; the two operate independently of one another.

Related pages

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