REPRODUCIBILITY: 100%
OS VERSION: 4.6.0.15
HARDWARE: Sony Xperia XA2 Plus and Sony Xperia 10 iii
UI LANGUAGE: English
REGRESSION: Yes
DESCRIPTION:
I have two SFOS phones - a Sony Xperia 10 iii (on EE in the UK) and a Sony Xperia XA2 Plus (on ‘3’ in the UK). Both were on OS version 4.6.0.13 and both were able to make/receive phone calls on either 2G/3G (XA2+ and X10 iii) or 4G (X10 iii only).
Both phones have now been upgraded to the latest 4.6.0.15 release and no problems or error messages were encountered when upgrading either phone. The upgrades went very smoothly and totally as expected (i.e. downloaded, install, blank screen, reboot, SFOS logo, progress bar, reboot, passcode entry, normal operation). Both phones show 4.6.0.15 in settings/about.
Everything works exactly as it should, apart from 2G/3G (i.e. non-VOLTE) phone calls.
The symptoms (on BOTH phones) are as follows:
- Make a phone call - screen says ‘dialling’.
- The 4G indicator, which I expect to drop to 2G/3G during this process, stays at 4G and mobile data continues to work throughout the ‘dialling’ period.
- Eventually the call times out and the error ‘connection problem’ is displayed
If you dial the phone from another (e.g. my iPhone 14) it simply rings on the dialling phone but nothing at all happens on the SFOS phone (either XA2+ or 10 iii). The call eventually goes to voicemail, but there is no indication on the SFOS phone that a call ever was received.
If you enable 4G calling on the X10 iii then calls can be made and received without problem. If you disable 4G calling again the same thing happens as above and no phone calls are possible.
PRECONDITIONS:
Sony Xperia XA2 Plus and or Sony Xperia 10 iii on SFOS 4.6.0.15, both phones being upgraded in the normal way from 4.6.0.13, not flashed from scratch with 4.6.0.15.
STEPS TO REPRODUCE:
See above
EXPECTED RESULT:
Non VoLTE phone calls are possible on both phones.
ACTUAL RESULT:
Only VOLTE phone calls can be made/received on X10 iii
MODIFICATIONS:
Patchmanager plus ICE patch on X10 iii & XA2+ and additionally patch (can’t remember the name) to shrink app grid icon sizes on XA2+
ADDITIONAL INFORMATION:
The following make no difference to this situation on either phone:
- Restarting the network subsystem from settings/utilities
- Re-booting the phone
- Swapping SIM cards
- Enabling/Disabling mobile data
- Swapping SIM cards from SIM 1 to SIM 2
- Enabling/Disabling SIM cards in settings/utilities
- Shouting loudly at either phone