Question

Contacts retrieval after the phone is lost. How can I do it?

Answer 1

You can retrieve your contacts if they were uploaded/synced with an online cloud storage device. For example, Google allows you to sync your contacts using online cloud. Apple, Nokia, Windows Phone, Blackberry use the same procedure. Add your account to your phone and then go to Accounts section. Initiate a forced sync and that's it. Your account should be delivered to your phone.

Answer 2

If you use an android phone you can use Tenorshare Android Data Recovery to recover the lost contacts. Detailed steps are as follows:
1. Connect your android phone to with PC via USB or WiFi
2. Start scanning and select the file which you want to restore
3. Save the recovered items

If you use an iPhone you can have a try with this iPhone data recovery tool to retrieve the lost contacts.