You have to use version 1.6 or 1.7 on the PC. Although the new Android version will do read only of kdbx 2.0 files. I find it easier to update via pc anyway, then sync to your phone, so you can try that w/ kdbx files. I use dropbox to make it easier to sync the files. You can install dropbox on the phone too. You don't even need to sync via cable then.