OTCv for iPhone in iOS version 10.3.1

[kaltenhaeuser]

Hello @ all,

we use OTCv for iPHone. Everything worked fine since the release of new OTCv in AppStore at the end of February.

OT: 2.1.1 - 10.0.000.071
OTCv: 2.21.15.3
iOS: 10.2.1

About three weeks ago, Apple released the latest version of iOS 10.3.1

We updated our iPhone devices to this new OS. Now there is no registration on SBC for "VoIP anywhere" when device is connected to LTE.
Off-site mobility with VoIP through SBC is working fine when iPhone device is connected to private wifi for example.

OT: 2.1.1 - 10.0.000.071
OTCv: 2.21.15.3
iOS: 10.2.1
Provider: T-Mobile

Do anyone know about this issue? Are there any settings I have to modifiy?

Thanks!

Thomas