My internet sharing option has disappeared.

[adwadeson]

When I got this phone there was no internet sharing option. Then I think an update (or something) made this option available. I have been using my phone's data as my sole internet connection for a month or so and just now the option is gone. I'm not certain if cricket has done this to my phone. How do we get it back?
Thank you

 

[Timbre70]

Check under setting, mobile hotspot.