Zoiper - Make calls & texts

Zoiper is a softphone app supporting IAX and SIP for VoIP calls through 3G, 4G/LTE, 5G, or Wi-Fi, without any ads. The app offers excellent audio quality with a user-friendly interface for a seamless Voice over IP experience. It is suitable for end-users, service providers, call centers, and businesses looking to leverage VoIP communications. To use Zoiper for VoIP calls, a subscription to a SIP or IAX service provider worldwide is required.

Zoiper Key Features:

- Different color scheme support

- Bluetooth compatibility

- Superior battery efficiency and reliability on Google Play

- Minimal latency compared to other android softphones

- High-quality audio performance, even on older devices

- Call capability over 3G and Wi-Fi networks

- Support for SIP and IAX protocols, compatible with all RFC compliant PBXs

- Background/multitasking functionality

- Integration with native Android contact list

- Speakerphone mute and hold options

- Support for UDP and TCP transports (advocates using TCP for enhanced battery life)

- Codec support including g711 (ulaw, alaw), speex, iLBC, and gsm

- DTMF sending capability

- DNS SRV support

- Built-in echo cancellation

- STUN functionality

- Customizable ringtone settings per account

- Call waiting feature

- Video support (available with subscription)

- ZRTP/TLS support (available with subscription)

- Call Transfer (available with subscription)

- Wideband audio (available with subscription)

Additionally, Zoiper offers customized branding solutions and VoIP SDK. However, warning against using Zoiper as the default dialer as it may disrupt emergency service dialing. Users are advised to download Zoiper solely from the Google Play Store to avoid potential risks related to unauthorized APK files available online.

FAQ

Error 408 Request Timeout

 This error means that the phone did not receive a reply from the server(or there is no connectivity with it) and is common with new installations or when changing the network connectivity, i.e. being it 3G/4G or WiFi network.

Check the routing device/ firewall settings

Common reasons include:

    • There is typo (or an extra space) in the host/domain name:

Open Zoiper -> Go to Settings -> Accounts -> (your account)

Double check that the setting for "Domain"is correct and does not contain any spaces.

    • There's an issue with your internet connectivity

Please open your browser and check  if you can visit a random website. If not, you have to fix your internet connectivity issue(s) first. If you are not able to do so yourself, we would suggest contacting your ITSP (internet service provider)

    • Your network provider is blocking VoIP calls. (this happens mostly in middle eastern countries)

• contact your internet provider and ask if they allow VoIP calls on their network;

• Use TLS encryption for the SIP signalling, especially when combined with a server running SIP on port 443.(this requires server side support for TLS);

• use RTP encryption for media;

• use a third party VPN service;

    • Your router is intercepting and changing the packets as they pass through

Be sure to Disable SIP ALG on the router. A list with problematic routers and solutions can be found here http://www.voip-info.org/wiki/view/Routers+SIP+ALG

    • A firewall on your device is blocking the traffic

A list with common firewalls and how to disable them can be found here:

https://help.backblaze.com/hc/en-us/articles/217664708-How-do-I-disable-my-firewall- 

    • A NAT router in between the softphone and the server is causing some packets to be dropped

Zoiper has a few settings to trick the server into sending the packets to a different IP address or port.

Please try different settings combinations of STUN (enabled or disabled) or rport for signalling (enabled or disabled).

STUN ON - Rport OFF

STUN ON - Rport ON

STUN OFF - Rport OFF

STUN OFF - Rport ON

Please note that:

A combination that works on one WiFi access point or 3G/4G network might not work on another.

A combination that works one WiFi or cellular network for a specific VoIP server might not work for another one.

If the above fails, please contact your provider or PBX administrator might be able to tweak a server side setting to make things work.

    • The PBX or SIP Provider  you are trying to connect to is currently down.

Please contact your provider for further assistance;

    • Your PBX is on an internal network, but Zoiper is not on the same network and no VPN is running.

Please make sure Zoiper and the PBX or on the same network or setup a VPN  between the device running Zoiper and your PBX. Please consult with your system administrator for additional help.

Check also if the needed ports by Zoiper are not blocked in your firewall/ routing device.

The default ports used by Zoiper are:

SIP port is random above 32000

IAX port is 4569 UDP

RTP port is 8000 and above UDP

Default STUN vallues:

Server hostname /IP :stun.zoiper.com

Port : 3478 UDP/TCP

Refresh period : 30

CONTACT

Sales Department

Our sales representatives are available Monday to Friday between 09:30 and 18:00 CET.

Email: sales@zoiper.com

Landline: +352 20333140

Overseas: +1 415 9065157

Technical support

Each email you send creates a new trouble ticket in our system. You will immediately receive an automatic response with your request number. Requests are usually served within one business day.

Please add *@zoiper.com to your white list to make sure that our emails go through your SPAM filters.

Help

If you are experiencing issues with download links, purchasing or licensing, please contact us using our contact form, https://www.zoiper.com/en/contact

Using Zoiper 5 and need help, but can't find it in the manuals and tutorials? Ask your fellow Zoiper 5 users on our community forum, https://community.zoiper.com/

More information and guides are available at our F.A.Q. page here, https://www.zoiper.com/en/support/home