1) Build a package via dpkg-buildpackage -rfakeroot -I.git 2) Install the package on your N9/N950 3) Copy el-v1.db from your N900 (Or from an N900 backup). 4) Better to delete all conversations unless you can live with duplicates. 5) Make sure the messaging ui is closed. 6) ./usr/bin/n900-comhist-import el-v1.db