i cant receive incoming call in IOS in the background while my iphone is locked

+4 votes

our server working properly with ANDROID even in the background they can receive incoming calls but , our application have some issue with(IOS) user's they cant receive incoming calls while the lock their iphone they get disconnected in the background , so please we need quick reply from your side to solve this issue because our company asks to ask help from your side , even i have configured the IPHONE quit correctly but i don't know what is the problem they cant receive calls in the lock background ,also we have this issue  with the free version and purchase   version we bought it with 4.99$ also same issue 

asked Mar 26, 2018 in iOS by azhen (160 points)  


If your iOS devices are updated to iOS above version 11.x, then this issue is known and we are working to resolve it. iOS is putting Zoiper to sleep when it is on background, the previous workarounds that we used seem to work less reliably now. Additionally soon we should also offer PUSH notifications to completely resolve this.

We are sorry for any caused inconvenience.

Do we need to pay for the PUSH option ?

1 Answer

0 votes

Hi there,

I am still getting this issue as of today. May I know if it is related? Don't think there's any mechanism to "wake" up the sleeping iPhone when its moved into hibernation mode. I am using TCP with keepalives at 20seconds. (qualify=20000).

answered Jul 16, 2018 by ngzhongcai (160 points)  

You could try to switch your accounts to TCP or TLS transport type (you can do so from the configuration menu of your account). Also make sure that your server does not send too many packets (more than 15 for 300 seconds). Otherwise iOS may kill Zoiper. I think that your qualify option is too low and iOS will kill the application. 

We are currently working working to release Zoiper with PUSH notifications. This should happen very soon and should resolve such issues.

Any timing on the PUSH notifications? Same answer was in early much


We are near a release, however I cannot provide time-frame. 

I have same problem, don't reveive message or phone call when the phone is locked

did you release a new version ?


You will need to use PUSH to receive calls or messages on background, we have already published the update with the PUSH, however we are still waiting for Apple to approve the new in-app purchase.

Wich on do I need for call and message ? G.729 codec or H.264 video codec ?

If i understand, i NEED to pay twice to have an application working fine ?Zoipier Premium + Codec 

Hello Tsetso.Zdravkov,

The update was published abt a month back with "push notifications".
Under "Settings >>> Incoming calls", I see the additional option "Use push notifications".
But there is no way for me to turn on this option.

As of today, my peers are still dying after a while of non-activity.
Can I check that this is indeed the case now?
That we still need to wait for Apple to approve the new in-app purchase before we can officially get this push notification?

Hello! Does this mean that the one who doesn't pay for the PUSH continues with background and battery issues? Thanks.

need to pay for push service?

Do I need to pay for the feature ?

The subscriptions are now available, they were finally approved by apple. You should be able to activate them.


tried push on iphone 8 with IOS 11, didn't work. and get worse: after turning push on, no incoming call again even not close zoiper. 

afterwards zoiper couldn't startup,and closed itself.

so we need to pay again for this feature ? why is it not included in premium version ?

@Synlau, it is subscription based and is an addition to the other premium features. You can use it only if you want it. 

@castro, you can use the contact form on our website to report the crash.

has this issue been resolved??

You can now enable PUSH notificaitions. There is no other way for Zoiper to work on background on iOS devices.

Ask your questions and receive answers from other members of the Zoiper Community.

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