1.Enable “Developer option” as the videos below :
If you are using Samsung phone ,please view
https://www.youtube.com/watch?v=tsJXqa9Ezm8
If you are using Pixel phone or other android phones ,please view
https://www.youtube.com/watch?v=xJPBp3Zo4PQ
2. Go To Next SMS app ,let the issue happen again .
3. Return to “Developer Options” window , tap "Bug report"/“Take bug report” or “Make Bug Report” .
4. Select “Interactive Report”and tap “Report”.After a moment, you get a notification that the bug report is ready.
5. To share the bug report, tap the notification,choose share from “Drive”(Google Drive) and save.
When the uploading is done ,cick the "Uploaded .." notification,choose "Share" item to share the report to help@handcent.com