MizuDroid SIP VOIP Softphone

Mizutech

About this app

MizuDroid is a free, unlocked, professional SIP softphone from Mizutech.

The app doesn't include any VoIP service. You are free to configure it to be used with any SIP server or service provider.

Note1: You will need to have a SIP account to be able to use this softphone and calls to mobile/landline phones might cost you money. See your VoIP service provider for the exact terms and pricing.

Note2: The softphone might try to run in the background and request to ignore battery optimizations only if push notifications are impossible in your network, for example if your SIP server is on private IP and doesn't support push notifications.

-The VoIP phone can be used with any VoIP service provider, any softswitch or PBX, including Asterisk, voipswitch, 3CX, Cisco, FreePBX, Elastix, OpenSIPS and others.
-Compatible with all IP phones and SIP dialers such as Acrobits, Bria, Linphone, Zoiper or CSipSimple
-Works on any network above 12 kbits (3G, 4G, LTE, 5G, WiFi, others).
-Not another csipsimple/sipdroid clone (SIP client stack made by Mizutech from scratch based on Mizutech AJVoIP Java SIP and media stack)
-Free for non-commercial usage. No advertisements.

FEATURES:
-Auto adapt to your environment (device/CPU/network/server and peers capabilities)
-Minimal CPU and battery usage. File size is below 8 MB and contains all SIP signaling and media features.
-Multiple SIP accounts (from advanced settings -> general settings)
-Multiple lines (simultaneous calls)
-Push notification support direct to SIP server or via FCM
-Call divert: mute/hold/forward/transfer/conference
-HD Audio, wideband and all common audio codec: Opus, Speex, G.729, GSM, iLBC, G.711 (PCMU/PCMA),
-Enchanted audio quality: AGC, AEC, PLC, noise reduction, silence suppression
-NAT/firewall traverse capabilities (with STUN, ICE, tunnel and related technologies)
-IM (chat), video, DTMF (RFC2833, SIP INFO and in-band), Voicemail, Voice recording, Balance display, Caller ID, Number rewrite rules
-Transport protocols: UDP/TCP/TLS. Support for DNS SRV
-VoIP tunneling and encryption (optional/automatic) with auto transport selection: UDP/TCP/TLS/HTTP/VPN (VoIP over HTTP)
-Call recording and file transfer
-Presence, BLF, contacts sync
-Peer to peer encrypted VoIP media
-VoIP to native dialer integration (optional) and integration with the native contact list
-Handle incoming calls while in sleep or doze (with push notifications or running as service if push is unavailable)
...and many more

Branded softphone builds with customizations are available for VoIP service providers and companies.
Contact [e-mail].
Details: https://www.mizu-voip.com/Support/Wiki/tabid/99/topic/Customized%20Android%20softphone/Default.aspx

Use the forum to submit any bug reports or suggestions:
https://www.mizu-voip.com/Support/Forum/tabid/92/forumid/8/scope/threads/Default.aspx

Softphone user guide:
https://www.mizu-voip.com/Portals/0/Files/Android_Softphone_Guide.pdf

Visit the homepage for more details about this SIP client:
https://www.mizu-voip.com/Software/Softphones/AndroidSoftphone.aspx

Ratings and reviews

Mi A2-lite. Android One (Q} Works fine with one sip account. If you have two providers it switches accounts around. Both may initially work but eventually an account stops working. I've uninstalled and reinstalled several times and still have the same problem. I think there is a config file/folder that needs to be deleted but I can't find it. App has a boat load of settings but navigation is a bit confusing. 3.5 stars.

Probably the best SIP/VOIP app. The only drawback is that it only supports a single VOIP line. Still, the app is easy to setup and configure, intuitive design, compatable with various providers, very customizable, and loaded with features. Also, love the large keypad! Bravo to the developer's. Great app!

Both on Android 10 and 11: Someone calling it and hanging up. Mizu fails to detect call was hung up. Pressing the red hangup button does nothing. Mizu is stuck this way. Subsequent calls aren''t causing it to ring. Second, when phone is sleeping, it fails to run in the background. I would love to see all this fixed, because all the alternatives I find more frustrating to work with and have their share of problems. Edit: still not detecting hangup, stuck, pressing red hangup does nothing, have to kill tasks to get it going again. It's so flaky.

What's new

This is a quality upgrade with bug fixes, improvements and optimizations.
Includes also an updated privacy policy, contact list upload feature removed and the incoming call issue with service and push notification have been fixed.