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Could one of you with TMO please follow my guide here to enable diag: https://forum.xda-developers.com/rog...-qpst-t4027493

When you've done that, and ensured it works through QPST, close down the QPST server, and download this: https://github.com/HomerSp/EfsTools/...mote-win32.zip and this: https://drive.google.com/open?id=13j...4sWPXHRu9JU-u9



Extract EfsTools-0.10-remote-win32.zip, and then extract tmo_mcfg.zip to that same directory (so you have mcfg_sw.mbn, mcfg_autoselect_by_uim and EfsTools.exe in the same directory).

Open up a cmd window and cd to the dir where you extracted EfsTools-0.10-remote-win32.zip, and run this:



Code: EfsTools.exe writeFile -i mcfg_autoselect_by_uim -o /nv/item_files/mcfg/mcfg_autoselect_by_uim EfsTools.exe writeFile -i mcfg_autoselect_by_uim -o /nv/item_files/mcfg/mcfg_autoselect_by_uim_Subscription01 EfsTools.exe uploadDirectory -i mcfg_sw.mbn -o / -v

This *should* hopefully finish successfully and after a reboot you'll hopefully have VoLTE and/or VoWiFi. You can of course try this with other carriers too, but you would need to replace the mcfg_sw.mbn included in the zip with one from your carrier (I used the TMO mbn from the Xiaomi Mi 9T because it's fairly comparable to the ROG Phone 2, not sure if it matters).Let me know if this works, please! If it does I'll write up another guide. And I will also need to look at if it survives an update.