was doing some digging;
found at&t and verizon's working with erricson & a company called roamware to implement this lte / volte roaming thingy / test -
AT&T, Verizon Mulling Managed Services With Ericsson | Light Reading
i also educated myself on lte roaming, this diameter authentication, authorisation and accounting
protocol, & how THAT'S affecting our nexus 5s & other phones during this testing.. -
**any can read this if they want** but i'm not delving into it now..
an interesting thing about our nexus 5s, are these settings -

which from this screenshot, i don't if they are toggle ON or OFF, but it shows capabilities..
& while on this topic xda is busy flashing roms to fix what ailing their connection from the network's end, they have buried within their own threads treasures which they can take lesson from -
Turn on SMS over IMS?
Nexus 5 Network Type Tests
i'm for sure of one thing, our next major nexus update, is to rectify this -
RCS-e stack for Android with GSMA API
found at&t and verizon's working with erricson & a company called roamware to implement this lte / volte roaming thingy / test -
AT&T, Verizon Mulling Managed Services With Ericsson | Light Reading
i also educated myself on lte roaming, this diameter authentication, authorisation and accounting
protocol, & how THAT'S affecting our nexus 5s & other phones during this testing.. -
**any can read this if they want** but i'm not delving into it now..
an interesting thing about our nexus 5s, are these settings -

which from this screenshot, i don't if they are toggle ON or OFF, but it shows capabilities..
& while on this topic xda is busy flashing roms to fix what ailing their connection from the network's end, they have buried within their own threads treasures which they can take lesson from -
Turn on SMS over IMS?
Nexus 5 Network Type Tests
i'm for sure of one thing, our next major nexus update, is to rectify this -
RCS-e stack for Android with GSMA API