The FoneDog Android Recovery Tool can be downloaded on our official website. This program is compatible with either your MAC or Windows computer. And once you’re done downloading the program, just go and install it and we are ready to recover those deleted contacts from your Sony Xperia XZ1 phone.
Step 1: Launch
FoneDog toolkit and Connect Your Device Sony XZ1 to Your Computer
Step 2: Turn on USB Debugging on Your Sony Xperia XZ1

Step 3: Select the Contacts You Want to Scan
Step 4: Preview and Recover Lost Contact from Sony Xperia ZX1

Always have the habit of backing up data on your Sony Xperia XZ1. You can try to do a backup via Gmail or your Outlook account after you have recovered all your contacts to your Sony Xperia XZ1 phone. Both of these applications will also be a good help for you in syncing your contacts from your mobile device.
Completed guide: Easy Way to Recover Deleted Contacts from Sony Xperia XZ1