Not able to share hotspot ?
Not able to share personal hotspot with others?
iPhone 6, iOS 9.3.1
You have told us nothing about symptoms, what you've tried, what has failed, what types of devices, what types of connections (e.g., WiFi, Bluetooth), ...
So here is some reading.
Share your Internet connection with Personal Hotspot - Apple Support
Get help with Personal Hotspot in iOS - Apple Support
iOS: System requirements for Personal Hotspot - Apple Support