Done this twice. Discovered I don't know exactly what I'm doing,but it works for me.Used the ringtone fix in motokit,deleted the db files,still didn't work right. I could edit ringstyles o.k. but could not edit contacts. When viewing a contact,pressing "VIEW" OR "EDIT" would boot me to the home screen. The fix was using MPT,deleting all contacts and re-installing them. I keep mine backed up fairly often,good thing.Was senselessly deleting stuff to make more memory,forgot the "all silent" bit,again.