Firstly, I'd like to thank Sony for opening up this concept program - I knew from day one that people were going to install this software from a non-legit source anyway - so its great that you have opened this up to all of us :)
Now to my questions :)
1) My carrier in Australia (Telstra) is rolling out a huge 700Mhz LTE network - this is classed as LTE Band 28. While my phone is a D6653, I have still flashed the D6603 firmware to it without issue. If I go into the ##SERVICE
menu -> Configuration, I notice LTE_BC28 is listed in the "Working Bands" list. Am I understanding right that this means 700Mhz LTE is working in this setup?
2) I am working with my carrier to test their VoLTE and soon VoWiFi setup. Can you please advise if these features are enabled in the Concept Software? I have no problems with configuring APNs manually, but haven't found a way to see if these features are turned on at all.
3) I'm testing IPv6 on a network. Can you please advise if the ROM will autoconfigure via SLAAC (and RDNSS) or if it also requires a DHCPv6 service?
Anything else I'm missing? :)