And in the post include:Device: Sony Xperia 1 IV (XQ-CT72, pdx223)ROM: LineageOS 23.2 (20260326)Country/Carrier: Bangladesh, GrameenPhone (MCC 470, MNC 01)Problem: Incoming calls fail on 4G/LTEFinding: adb shell service call ims 5 i32 0 i32 1 returns "Service ims does not exist"IMS tab in *#*#4636#*#* shows: Not Registered, VoLTE Unavailable3G calls work perfectly