XZ1 from Japan. Installed latest CE1 FW, partial Simlock - Sony Xperia XZ1 Questions & Answers

Hi. I've recently ordered a new XZ1 from Japanese distribution. Phone is working (without NFC of course) on latest Customized CE1 firmware. But I have a problem with calling. I can call anybody but no one can call me. LTE/4G and Edge/2G data is working. But phone doesn't see any 3G networks (I tried 2 Polish Play SIMs and one Plus SIM with the same effect). I enabled VoLTE by flashing oem from Japanese Softbank but this didn't help. I checked service menu - simlock status and there is one "X" sign at Network subset with number 5 beside. So now - is it possible to fully unlock sim so that I could actually use WCDMA connectivity to receive calls?

Network [0] either means the phone is network unlocked or unlocking no longer available
Network Subset [5] mean the phone is Carrier restricted and this restriction only allow certain SIM cards (most being seen CDMA network band I 2.0GHz)
you might have to either contact the distributors (au, docomo, SoftBank) or provide these informations to 3rd party services.

Hi,
I've got the same issue with my japanese XZ1 (SOV36), only EDGE or 4G.
Did you figure out how to fix it ?

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