Password Recovery

Errors & Problems

 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 installation...
Last Modified: 2017-10-20 18:30:29

      Introduction: Missing or one way audio is one of the most common issues with VOIP, fortunately in most cases it is relatively...
Last Modified: 2017-10-20 18:29:20

Introduction: This tutorial is about bad quality audio. For complete lack of audio in one or both directions, please refer to the missing audio tutor...
Last Modified: 2017-01-18 16:05:50

Introduction: Issues related to incoming calls are a common problem with voice over IP. This article aims to outline the most common problems for th...
Last Modified: 2017-10-11 18:15:47

The issue that you are experiencing might be because the DNS server does not reply at times. (this could be a firewall issue, a problem with Windows o...
Last Modified: 2017-07-04 14:00:19

SIP 403 is shown when the server understands your request, but is refusing to fulfill it. You will need to contact your VoIP service provider or PBX a...
Last Modified: 2017-02-13 18:31:03

This issue appears mostly because the session was not actually established and is in most cases network(NAT) related. For example when you receive a c...
Last Modified: 2017-10-13 17:00:07

  Windows:   The Zoiper installer for Windows contains both a 32 bit build and a 64 bit build.   The 32 bit version will wor...
Last Modified: 2017-02-15 16:01:23

SIP 401 - Unauthorized  usually means that the request requires user authentication.   This error message is returned by the SIP server, o...
Last Modified: 2017-02-09 17:36:03

When using Asterisk, you might see warning messages in the logfile or on the CLI "Unknown RTP codec 95 error". You can safely ignore these messages, ...
Last Modified: 2017-02-06 10:55:13

Error SIP 603 is usually returned as a response when the called party was successfully contacted, but can not or does not wish to participate. This er...
Last Modified: 2017-02-10 14:07:04

This error shows that the Zoiper process has stopped working and Windows is displaying it.  This issue can be caused by some antivirus applicati...
Last Modified: 2017-02-10 15:19:19

SIP 404 - Not found. error means that the server could not find the extension (or number) you have dialed through the softphone.   This is usua...
Last Modified: 2017-02-09 18:28:14

The error message "SIP 923 / No DNS results / Service or option unavailable" is usually shown when:   the server information is not provided ...
Last Modified: 2017-10-03 15:39:18

If this error occurs at registration time, please ask your provider for assistance. It means they are rejecting the registration for unknown reasons. ...
Last Modified: 2017-02-05 13:33:37

  Chat and Presence To use IM and presence your SIP server / provider must support it as well.Zoiper uses SIP "MESSAGE" messages for the chat s...
Last Modified: 2017-09-29 16:29:40

Mac:   http://superuser.com/questions/548119/how-do-i-configure-custom-url-handlers-on-os-x   From the follow the link to download R...
Last Modified: 2017-03-06 16:23:52

With Huawei devices, to allow Zoiper to work on background you need to do the following: Install ZoiPer and start it. Select "No" when prompted to...
Last Modified: 2017-04-27 13:53:30

  Phantom calls from unknown numbers (100, 1000, 101, 1, 1005 ...) are usually from SIP scanners/ scammers and are called "ghost calls". If you...
Last Modified: 2017-05-05 16:36:35

Zoiper officially supports Bluetooth devices that use only the SC0(mono) BT profile. Note, the Bluetooth support in Zoiper is currently listed as Bet...
Last Modified: 2017-05-17 16:57:26

    Windows, Mac and Linux:   Make sure first that you are using the proper number pad. Zoiper5 comes with two number pads, on...
Last Modified: 2017-10-27 14:10:54

The Zoiper window can appear "transparent" whenever the color depth of the display is set to 16-bit or when you are using RDP with quality options tha...
Last Modified: 2017-01-12 16:40:20

When the operating system notifies Zoiper that there is a network change, Zoiper shows a popup and will take the necessary actions to let the server k...
Last Modified: 2017-02-06 10:51:57

  To stop the integration with the native dialer follow these easy steps: Go to Zoiper "Config" -> "Advanced " ->  "Dialer Integra...
Last Modified: 2017-02-07 14:39:50

  Windows:   Zoiper saves its contacts file in 'C:\Users\your username\AppData\Roaming\Zoiper'.   Make sure that the current W...
Last Modified: 2017-02-10 15:21:11

If you are experiencing issues with the initial Zoiper installation, this might be due to your antivirus software or file corruption. You may receive...
Last Modified: 2017-10-24 15:40:08

All versions of Zoiper are scanned for viruses before we upload them to our website, Google Play, iTunes or the Windows Store. For your safety, pleas...
Last Modified: 2016-12-25 10:33:27

Chat and Presence To use IM and presence your SIP server / provider must support it as well.Zoiper uses SIP "MESSAGE" messages for the chat session h...
Last Modified: 2017-10-12 13:02:23

Zoiper 1.x will show multiple entries for one contact if that contact has multiple phones numbers (e.g. one for mobile, one for work, one for home etc...
Last Modified: 2017-02-07 14:28:56

This issue is a known issue, it is fixed in Zoiper 3 version 3.15 Please upgrade to this latest version if you are experiencing this problem.
Last Modified: 2017-02-07 17:58:28

This issue was happening due to a bug in zoiper for iOS in combination with the sipgate provider. Please upgrade to the latest version of Zoiper for...
Last Modified: 2016-12-26 16:04:04

  Android:   Zoiper 1.x for Android does not support landscape mode.  Zoiper 2.x for Android supports landscape mode. You ...
Last Modified: 2017-02-07 14:34:40

Zoiper does not playback voice messages on errors. If you do hear a voice message, the account settings in Zoiper are most likely fine, but somet...
Last Modified: 2016-12-13 16:22:44

The download links which you have received when you purchased Zoiper automatically expire after 15 days. You can get the latest download links&n...
Last Modified: 2017-02-10 15:26:38

Please follow this help document if you are unable to download Zoiper for desktop with Google Chrome:      
Last Modified: 2017-02-07 14:35:48

Please upgrade to the latest version of Zoiper for iPhone. If that does not resolve the issue, please contact us on support@zoiper.com
Last Modified: 2017-02-07 15:08:04

The SIP 407 "Proxy authentication required"/ "Bearer capability not authorized" - the client should first authenticate with a proxy server. Usua...
Last Modified: 2017-10-03 15:42:43

The "SIP 400" error comes from your VoIP server for some reason, and usually means "Bad request".  This error might appears if there is a proble...
Last Modified: 2017-09-29 16:20:19

Enabling BLF in Zoiper 5   BLF is available in Zoiper PRO only. If using Zoiper Free you will need to upgrade to PRO version.   Run Zoip...
Last Modified: 2017-10-19 18:35:19

If you are experiencing issues starting Zoiper on MS Windows you should always first check the configuration of your security software. For exam...
Last Modified: 2017-10-26 14:22:51

Chat and Presence To use IM and presence your SIP server / provider must support it as well.Zoiper uses SIP "MESSAGE" messages for the chat session h...
Last Modified: 2017-10-20 11:46:59

When Zoiper cannot display the preview of the camera and there is a "broken image" icon on the top right corner of the preview window, it's most ...
Last Modified: 2017-10-12 14:42:25