ZuluTalk 1.2

ZuluTalk 1.2 for Android: a free, open-source calling app built on Linphone Android 6.2.8 by Belledonne Communications, released under the GNU GPLv3.

Download: zulutalk-1.2.apk below (Android 9 or newer, 64-bit ARM phones). Check it against SHA256SUMS.

Changes in this release

• 1.2: call video rescales correctly when a foldable phone is folded or unfolded during a call.
• 1.1: on mobile data and slow networks, video is capped at 384 kbit/s and QVGA, so it no longer freezes. Running calls adapt when the network changes.
• 1.0: ZuluTalk branding and package (com.zulutalk.app); calling-only defaults with no linphone.org services; the caller switches to speaker on outgoing video calls.

See ZULUTALK.md for full details.

Notes

• ZuluTalk is software only. It does not include a phone service; you connect it to a SIP account. Do not rely on it for emergency calls.
• You are responsible for following the laws on internet calling in the country where you use it.
• Known issue: a call hang reported on one foldable phone is being investigated for 1.3.
• Problems and error logs: reports@zulutalk.com. Please don't report them to Linphone.

Credits and license

ZuluTalk is based on Linphone, © 2010-2025 Belledonne Communications SARL, and the Linphone SDK 5.5.35 (unmodified). All original authors are credited in this repository's history. ZuluTalk is distributed under the GNU GPLv3; the complete source for this APK is the v1.2 tag and the attached source archive. ZuluTalk is an independent fork. It is not affiliated with, endorsed or supported by Belledonne Communications.

ZuluTalk is a product of Thanaaya Technologies, Dubai, UAE.