What happened to my personal hotspot?

I used to have it but now it's gone. It won't show up in my cellular thing, it was usually right below it.
My phone is iPhone 5s
How can I get my personal hotspot back? Thank you!
God bless. What happened to my personal hotspot - 1

Perhaps the owner of the unsecured network you were using was shown how to make their modem secure, so your 'personal' hotspot has been closed, for good. Use your own Wi-Fi modem in future.

Update the software.

  • Will I be able to use my mobile as a personal hotspot? I'm with optus and have unlimited internet… Just wondering if personal hotspot will work on my iphone? Its not coming up on my phone it's just saying carrier, bluetooth etcetera. Please only people from australia. ps I only just set up my prepaid plan but its working fine on my phone?
  • What additional cost may occur from making my iphone a personal hotspot? I turned on the personal hotspot option in settings on my iphone but it says additional costs may occur. Does that mean it costs money for me to connect my other devices or just if i exceed the amount of 3g i'm paying for.
  • Is the personal hotspot option on the iphone safe? I just learned i can use my iphone as a hotpot and i freaked out! Apparently you go settings, general, network, the it says personal hotspot! So is it safe? More importantly does it cost a lot or free?
  • If you have a personal hotspot does that make your 3g Internet faster? I'm new to this whole personal hotspot thing but I do have some information that I know like how it acts like a personal router to other devices such as Xbox, ipod, computer, etc. The only questions that I don't know are the ones below. -would it make my iPhone 4S much faster? -does it cost money to get it and if so how much? Oh i'm on sprint btw!