HappyID helps you to identify who is calling you.
The application shows you notes, company, position, birthday, closest event from the calendar and so on during the call. You could even sync all your notes with Evernote.
HappyID is FREE and without ads.
Please help us with translations: http://crowdin.com/project/happyid/invite
For dual sim phones please activate "Dual-Sim" option in settings.