If you have backed up your iPhone data to iCloud before.
You can certainly retrieve photos from iCloud with FonePaw iPhone Data Recovery.
It is composed of 3 steps, all you need to do is just to sign in your iCloud account and then download a certain backup and final save it to your computer.
It is very easy for you to proceed on.

What to do when you found no contacts in your iPhone?
You can use FonePaw iPhone Data Recovery to take a direct scan of your iPhone and then preview those found contacts one by one.
Besides, if you have backed up your iPhone data to iTunes or iCloud before, it can also help you by scanning your iTunes or iCloud backups.
Hope it helps.
Read more:
How to Restore Contacts on Your iPhone

I recommend you to use FonePaw iPhone Data Recovery, which is a useful recovery software. You can recover them through it. The following steps are gonna teach you how to recover deleted notes on iPhone.

Step 1. Install the software in the computer and then connect your iPhone to PC.
Step 2. Choose a suitable mode. They are "Recover from iOS Device", "Recover from iTunes Backup File" and "Recover from iCloud Backup File".
Step 3. Start scan your iPhone.
Step 4. Preview and select what you want to recover. After click "Recover" button, you will get lost notes back.