Reliability improvements and behind-the-scenes updates.

• Fixes for outbound-call compatibility and call ending while ringing. • Keypad shows long international numbers in full; long-press 0 for +. • Dialing works when only the second line is signed in. • In-app diagnostics for faster support troubleshooting. • Stability improvements.

What's new in 1.6: • Minimize a call: tap ▾ at the top of the call screen to use the rest of the app (Messages, Contacts, History) while the call continues, then tap the green bar to return or hang up. • The Account screen now shows your signed-in lines immediately when you reopen the app, instead of a blank sign-in form while they re-register. • Reliability improvements.

New in 1.5: • Choose which line to send a message from (Line 1 / Line 2) • Set a different incoming ringtone for each line • Give a specific contact their own ringtone • Pick a custom message alert tone per line • Reliability improvements

New: choose your incoming call ringtone — pick from a set of built-in tones in Settings. Plus stability improvements.

Bug fixes and improvements: - Incoming calls now show the saved contact name from your phonebook - More reliable background call delivery and audio - Sign-in improvements and stability fixes

• Support for SIP accounts hosted on non-standard ports. • Improved sign-in reliability and clearer registration status. • Stability and performance improvements.

• Company phonebook: if your provider's PBX publishes a directory, Contacts now has a Web Service tab listing your colleagues' extensions, ready to search and call. • Message timestamps, and a tap-to-resend option on messages that fail to send. • The keyboard now closes automatically when you place a call from contact search. • Layout fixes on the keypad and welcome screen. • Improved reliability of incoming calls when the app is closed.