2. Connecting Your iPhone to the Internet, Bluetooth Devices, and iPhones/iPods/iPads - My iPhone for Seniors (Covers iOS 9 for iPhone 6s/6s Plus, 6/6 Plus, 5s/5C/5, and 4s), Second Edition [Book]
iPhone Personal Hotspot: How to switch between 2.4GHz and 5GHz bands
How to Use Instant Hotspot on iPhone and iPad - MacRumors
Call with Wi-Fi Calling - Apple Support
Using Personal Hotspot — Apple Device Support Tutorials | Apple Training
Using Personal Hotspot — Apple Device Support Tutorials | Apple Training
Apple iPhone 5s - Personal Hotspot - AT&T
How to Turn Your Phone Into a Wi-Fi Hotspot | PCMag