3CX SMB Failed to send APNS PUSH to device iPhone17,5

[MarH]

Hello 3CX Community,

on of our clients cant use their 3CX Apps on their iPhones.
We have a lot of instances hosted by ourself, there we have no issues.
This client is using the 3CX SMB and hosted by 3CX.
The Error Log shows:
Failed to send APNS PUSH to device iPhone17,5 (Ext. xxxx). Internal exception occured: The response ended prematurely while waiting for the next frame from the server. (ResponseEnded)

Failed to send APNS PUSH to device iPhone18,1 (Ext.xxxx). Internal exception occured: An error occurred while sending the request.

Following these Threads:

Solved Thread 'Failed to send APNS PUSH to device iPhone'

Apr 2, 2024

All of our 3cx customers are having the same issue.

APNS push to their iPhone devices is not working.

i've tried restarting the pbx services (as suggested in a previous thread), but that doesn't solve the issue.

What is causing this and how can i solve this for all my customers ???

• BVandeWoestyne
• iphone push
• Replies: 7
• Forum: iOS

Solved Post in thread 'Failed to send APNS PUSH to device iPhone15'

Mar 28, 2024

Perfect!
Thank you for the feedback

• OlegR_3CX

i cant restart the server since it is hosted by 3CX and there is no option to do that.
What can i do?

 

[Vali_3CX]

Have a look at this, maybe could help, from SMB forum:

Post in thread 'APNS Push failing to iOS devices, calls not coming in to SoftPhone'

Jan 25, 2026

I see the same error as InfoMyndTech describes in the Version 20.0 Update 8 (build 1089). Does anyone have a remedy for this? Or pointer what is the origin of this error?

Try disabling IPv6. We've seen many of those Push errors being caused by bad IPv6/v4 conversion in some cloud providers which caused these Push issues (and others as well in some cases.)

• Evolute IT

• 

 

[mikepro0517]

I also have a 3cx hosted client who cannot receive push notifications.

 

[KyriacosS_3CX]

I also have a 3cx hosted client who cannot receive push notifications.

probably best to open a separate thread, so you can provide details of what errors they are seeing etc - perhaps it's not the same issue?

 

[MarH]

Since i got no answer here, and also on the other Thread. Im asking friendly for help again.

Post in thread 'APNS Push failing to iOS devices, calls not coming in to SoftPhone'

Mar 4, 2026

How to disable IPv6 on the 3CX SMB hosted by 3CX?

• MarH

 

[N_G]

You can not touch the OS with hosted by 3CX. Host it yourself to do what you want.