What should i do

You could not have enough space on your iPhone.

See this support guide:

Get help with over-the-air iOS updates - Apple Support

If you stll can't update, connect your iphone to a computer and update via iTunes latest version.

If you don't have a computer, borrow one from your friends or make an appoitment at your most convenient Apple Store or Authorized Service provider: Apple - Find Locations - Location Selector

Regards

Giulio

boofitz:

The image does not show a WiFi symbol - are you connected?

Isn't that the personal hotspot symbol? I haven't really used mine as a personal hotspot, so I don't know if the WiFi symbol shows or should show when it's enabled.

The image does not show a WiFi symbol - are you connected?

I believe you are correct although that may the issue - essentially using data