I have the exact same issue with oneplus 7. Tried phh gsi and express Luke based on phh. Calls and texts don't work only data.installed on Galaxy Note 10+ SM-N9750. Stock rom works fine on Verizon (data, voice, mms) but on all GSIs I have tried (including this one) only Data works (no voice, mms). Is this APN or Volte related? I'm unsure where to begin. I'd really like to use this AOSP treble GSI instead of stock.