How to get the information i synced to the laptop back into my iphone?

A little while ago, I have backed up all my iphone contents onto itunes in my laptop.Since my phone lost its data, i want the data i saved in itunes back to my phone. How do i do this?

Plug your phone in and there will be an option to restore your iPhone, simply do a restore from your latest backup.

ITunes

Connect your device to the computer that you stored your backup on.
Open iTunes. If iTunes tells you there's an iOS update, get the latest version.
Go to File > Devices > Restore from Backup. If you're using Windows and don't see a File menu, press the Alt key.
Look at the date and size of each backup and pick the most relevant.
Click restore and wait for the process to finish. Your device will restart and then sync with your computer. Stay connected until the sync finishes.

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