iPhone PUSH errors, 50020

[Tom Buckler]

I'm getting a bunch of these today for an assortment of iPhones/extensions. There's always been a couple a day but this morning it seems worse. What could be going on here? (Hosted, Version 20.0 Update 8 (Build 1109 Release))

Error

50020

03/23/2026 9:42 AM

System Manager

DEFAULT

Failed to send APNS PUSH to device iPhone 15 (Ext.118). Internal exception occured: The response ended prematurely while waiting for the next frame from the server. (ResponseEnded)

 

[Charles_3CX]

Regarding your question, we would need to check this via logs and data. To do so, please open a support ticket with 3CX technical support via your partner portal so we can request the required data.

 

[Alphabetic]

According to another 3CX post for this, it was resolved with a reboot - Have you tried this?