Hi AmricTals,Thanks for your question. When you say you can no longer backup to iCloud since you updated to iOS 10.0.2, what happens when you try? Could it be possible that you don't have enough available space in iCloud to backup your iPhone? Are you able to backup your iPhone to your computer using iTunes? The resources below will provide more information regarding these options.Manage your iCloud storage If iCloud Backup couldn’t be completed or you can’t restore
How to back up your iPhone, iPad, and iPod touchiTunes
- Open iTunes and connect your device to your computer.
- If a message asks for your device passcode or to Trust This Computer, follow the onscreen steps. If you forgot your passcode, get help.
- Select your iPhone, iPad, or iPod when it appears in iTunes. If your device doesn't appear in iTunes, learn what to do.
- If you want to save Health and Activity data from your iOS device or Apple Watch, you need to encrypt your backup: Select the box called Encrypt [device] backup and create a memorable password.
Write down your password and store it somewhere safe, because there's no way to recover your iTunes backups without this password.
If you don't need to save your Health and Activity data, you can make a backup that isn't encrypted. Just click Back Up Now.

- After the process ends, you can see if your backup finished successfully in iTunes Preferences > Devices. (If you're using iTunes for Windows, choose Edit > Devices from the menu bar at the top of the iTunes window.) You should see the name of your device with the date and time that iTunes created the backup. If you encrypted your backup, you should also see
beside the name of your device.

Get help making a backup.
AmricTals, please let us know if you were able to back up your iPhone either to iCloud or to iTunes with these resources. If the issue persists, please provide additional information regarding your issue, including any error messages you may encounter.
Take care.