To recover lg messages and contacts you need to use some android data recovery to help. Here I'll guide you how to regain lg messages on pc with Amacsoft Android SMS + Contacts Recovery.

Note: You need to root your lg phones first, otherwise this problem won't detect and scan your device.

Step1: Connect LG phone to pc and start the problem
At first, connect your LG phone to computer via USB cable, then start the Amacsoft Android SMS & messages Recovery. Make sure your LG phone has been linked to computer correctly, or this data recovery problem couldn't detect it successfully.

Step2: Enable USB Debugging
You need to enable USB debugging on your device, then the data on your android phone will be synced to computer. And the problem will scan your device directly. And you just need enable USB debugging for once.

Step3: Preview and Recover Messages
After the scan, you can preview all of your messages and contacts on an interface. And this problem could help you distinguish deleted messages with exsiting messages. Then you just need to sekect and check those you need to recover, and click "Recover" to save lost messages on your computer.

That's all! And you can also use the Amacsoft Android SMS & Contacts Recovery to restore android phone contacts in the same way.