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Origineel bericht door: Tom Chai ,

Tekst:

This could be either due to carrier or the phone, or both.

Likely scenario 1:

* Carrier do not support VoLTE, or the service is not enabled on the number/device, therefore CSFB is needed.
* The carrier’s 3G service is deployed on a band or technology that the phone does not support, or it technically supports, but broken.

Likely scenario 2:

* Bad carrier provision, which resulted in non-standard signaling behavior that happens to be not supported by this device, or its specific baseband software version.

Since no specific carrier or device model is mentioned, no cross-testing of various carriers and devices has been performed, we can only guess now.

Status:

open