Voice/video calling via Zangi
With Zangi you can place a call to anyone in the world for free if they’re also a Zangi user. To make a call, you will need a Wi-Fi, 2G/ 3G/ 4G/5G connection. If you want to make calls to non-Zangi users, Zangi offers a paid service called: Zangi-Out, with low-cost rates.
Making Zangi voice calls
If you want to make an audio call: go to Calls → Open Keypad → dial the number you want to call → press the call button → choose between Call, Video, Chat, Zangi-Out. You can also call a person from their profile info: opening the profile from the Contacts, Calls or Chats section.
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Calling availability
Zangi works everywhere, in every country. While other messengers may be banned or taxed in some countries, Zangi is proud to say that it’s up and running everywhere. And calling is possible in any network: from 2G/EDGE to noisy Wi-Fi and Satellite networks.
Security of calls
Zangi encrypted messaging app uses leading-edge cryptography to protect calls between sender and receiver, as well as the communication between the app and the servers. Zangi encryption algorithms work transparently in the background and don’t need to be activated — they are always on.
Strength of encryption:
— RSA-2048 and AES-GCM for client-server data transport encryption
— Advanced Encryption Standard (AES-256) for symmetric encryption
— Elliptic Curve (Curve25519) cryptography for authentication
— Elliptic Curve Diffie-Hellman (ECDH) for key agreement
— Secure Hash Algorithm (HMAC-SHA256) for message digest
— Customized TLS/Noise for encrypting the transport layer
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Ringing/answering
When making a call you will see several statuses of the call: First it’ll say Calling, then quickly change to Ringing (request sent to person you’re trying to call), and then the timer will start once that person picks up the phone.
If it says Answering, instead of Ringing, then there’s a calling error. Please try again.
Changing ringtone
To change your ringtone go to: app Settings → Notifications → Call Notifications → Sound → And choose either 1) Zangi’s Default Tone 2) Your Device Default Tone (the ringtone of your device). If you change your device ringtone, you can also have it changed on Zangi.
Showing/hiding online status
You can choose who sees your status from the app Settings → Privacy → enable/disable Show My Online Status, Show When I’m Typing or Show Seen Status.
Remember that you won‘t see Last Seen timestamps for people with whom you don’t share your own. You will, however, see an approximate last seen value.
Group calls/conferencing
Conference calls are only available for iOS devices as of now. Conference calls between Android devices is in beta testing now and will be available soon. Please note: conference calls are audio calls, not video.
Making Conference calls
To make a conference call first create a group chat: tap on the pencil icon → choose multiple member(s) you want to chat with → open the chat → tap on the call icon → make a conference call. If not all members are online, there has to be at least one member who accepts the call, for the conference call to take place. Members can also join/leave in the middle of the call by tapping on Join or End Call. A maximum of 4 people can be in a conference call.
International calls
With Zangi-to-Zangi calls, you can have international calls for free. The number of calls and messages are not limited. Both sides just need to have the app on their smartphones and need to be connected to a working internet connection
How to get international roaming at a fraction of the cost?Call-Forwarding will come in handy. To call non-Zangi contacts, Zangi offers a paid service called: Zangi-Out, with low-cost rates.
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Call Forwarding & roaming
While you are in a different country, you may use a local SIM card to pay less for calls and data usage, with Zangi. If you have added and activated the Call-Forwarding number, and someone places a Zangi-Out call to your main Zangi number, our system will automatically forward that call to your new number at the Zangi-Out rate. This eliminates the need to inform everyone about your changed number.
Activating/Deactivating Call Forwarding
To activate the Call Forwarding feature, go to your Zangi app Settings → choose Call Forwarding → tap Add New Number → add that country’s local SIM card number. When it’s time to deactivate Call Forwarding: go to the same place → edit → delete the number(s).
Related resources
Zangi-Out
Zangi-Out allows Zangi users from all over the world to make low-rate calls from smartphones to landlines or mobile (GSM) numbers, even if they are not a Zangi-user. You can place emergency calls with Zangi-Out.
How to make Zangi-Out Calls
To use Zangi-Out you need to have Wi-Fi or any Internet connection but the person you’re calling doesn’t need to be connected to internet/Wi-Fi
Option 1) Go to Calls → Open Keypad → dial the number you want to call → press the call button → choose between Call, Video, Chat, Zangi-Out.
Option 2) From Contacts → tap on the profile of a contact → tap on Call, Video, Chat, Zangi-Out, etc. If you only see the Zangi-Out option, then this person is not a Zangi user.
Option 3) From Calls → Keypad → enter the phone number of the person you want to call → tap on the call button → tap on either Call, Video, Chat, Zangi-Out. If you only see the Zangi-Out option, then this person is not a Zangi user.
Option 4) If you’ve already started messaging with someone: Chats → tap on the contact info on top-left → tap on Call, Video, Chat, Zangi-Out, etc.
Option 5) If you’ve already had a call with someone: Calls → tap on the (i) on the right side of call → tap on Call, Video, Chat, Zangi-Out, etc
You must have credit to make Zangi-Out calls. To add credit or check your balance go to your app Settings → My Balance → Select an option (iOS only). Check rates for any country for Zangi-Out calls from our site or from your app Settings → My Balance → Our Rates. To find out the call rates for specific contacts go to their contact info → More.
The reason why Android users cannot make credit purchases, is because the Android purchasing system was found to be insecure. It were causing fraud problems, therefore we had to switch it off.
Related resources
Deleting call history
To delete call history:
iOS: Go to Calls → swipe left to delete individual calls → or tap Edit → Delete All or delete individual calls.
Android: Go to Calls → long press to delete individual calls → or tap on the 3 dots → Delete All.
Audio/video calling issues & quality
Our call quality is 720p resolution with photo-realistic colors and crystal clear voice. But you may be experiencing quality problems for one or more reasons. Here are quick fixes:
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Switch to a better Internet connection
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Ask the person you’re calling to switch to a better connection
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Turn off your Low Data Usage mode for better quality calls. Turn it off from your app Settings → Low Data Usage → Enable/Disable low data with Cellular use or Wi-Fi use.
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Turn off the video, and speak with audio if the quality is off
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Your phone needs to be restarted or turned off and on.
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The contact you are calling has blocked your number.
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You haven't completed the initial verification process.
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The number/email of the contact you're trying to call on Zangi hasn't been saved correctly on your phone.
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Note that: the quality for video calls on Android may not be perfect at times
Also note that: sometimes calls won’t go through with a 2G connection, try calling with a connection higher than 3G.
The video is not working
If you’re making a video call, and you can’t see the other person ,that’s because they still haven’t turned on their video.
To turn on your video tap on the screen and tap on the video icon. To turn off the video tap on the screen again and tap the video icon once more.
If you’re seeing a black screen, the video might be put on the back camera mode. Switch from front and back camera mode by tapping on the switch camera icon.
The most common reason why you can't make or receive Zangi video calls is poor Internet connection. There might also be other problems, please follow this list to fix this issue:
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The contact you are calling is connected to poor internet connection.
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The contact you are calling is offline.
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Your phone needs to be restarted or turned off and on.
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The contact you are calling has blocked your number.
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You haven't completed the initial verification process.
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The number/email of the contact you're trying to call on Zangi hasn't been saved correctly on your phone.
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Turn off your Low Data Usage mode for better quality calls. Turn it off from your app Settings → Low Data Usage → Enable/Disable low data with Cellular use or Wi-Fi use.
-
Note that: the quality for video calls on Android may not be perfect at times
-
Also note that: sometimes calls won’t go through with a 2G connection, try calling with a connection higher than 3G.
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If you still can’t figure out what’s going wrong, contact support and send us a detailed description of the problem.
Can’t hear voice
If you can’t hear audio, please follow this list to fix this issue:
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Earphones reconnecting
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Bluetooth turning off and on
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The contact you are calling is connected to poor internet connection.
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The contact you are calling is offline.
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Your phone needs to be restarted or turned off and on.
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The contact you are calling has blocked your number.
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Turn off your Low Data Usage mode for better quality calls. Turn it off from your app Settings → Low Data Usage → Enable/Disable low data with Cellular use or Wi-Fi use.
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If you still can’t figure out what’s going wrong, contact support and send us a detailed description of the problem.