Re: how to restore lost contacts..in lenovo A7000 please provide good suggestions.
Welcome to Android Central! Do you remember which account those contacts were saved to? If it was your Google account, then they would've automatically synced with your Google Contacts in the cloud, and should be able to sync easily back to the device. If they were saved only to the local Device Account, those don't sync or backup anywhere automatically, so you most likely lost them for good. This is why you should always strongly consider saving all of your contacts to your Google account.