Z3DMR

Z3DMR turns your phone into a Digital Mobile Radio (DMR) transceiver for the amateur-radio
network. Connect over the internet, key up, and talk to licensed operators anywhere in the
world - no extra hardware required.

Built by Radio Amateur Club Z37CPR (Macedonia) to modernize amateur radio and connect
operators across the DMR network without geographical limits. Completely free. No ads. No
tracking.

WHAT YOU CAN DO
• Push-to-talk over any DMR master server (BrandMeister and other Homebrew-protocol networks)
• Group calls on talkgroups and private calls to individual operators
• Built-in talkgroup and DMR-ID directories with search, favourites and recents
• Live activity log - see who's talking, their callsign and target, in real time
• Multiple connection profiles - switch identities and networks in a tap

MADE FOR REAL OPERATING
• Hold-to-talk or tap-to-talk PTT, with optional hardware / Bluetooth PTT button binding
• Busy-channel lock so you don't key up over someone
• Transmit time-out (TOT) with visual and audio warnings
• Auto-connect and auto-reconnect when the network changes
• Runs reliably in the background with a clear status notification
• Incoming-call and connection alerts, with sound and vibration options

AUDIO THAT WORKS
• AMBE voice via the on-device MD-380 vocoder (one-time firmware download)
• Automatic gain control, manual RX/TX gain, and a high-pass mic filter
• Key, PTT and end-of-transmission tones

YOURS, PRIVATE BY DESIGN
• Your profiles stay on your device; master-server passwords are encrypted with the Android
Keystore
• No advertising, no analytics SDKs, no crash-reporting SDKs
• Choose from English, German, Spanish, French, Italian, Polish and Macedonian

IMPORTANT
Z3DMR is a tool for LICENSED amateur-radio operators. You need a valid amateur-radio license, a
DMR ID and access to a DMR network to use it. As with all amateur radio, transmissions are not
encrypted and are heard by other operators on the talk group - this is how amateur radio works.

Join the community for help, feature requests and bug reports: https://t.me/z3dmr