Hi,
Just to let you know that it's nothing about carrier's restrictions, unless you are in US.
The iPad comes with 2 anthena types:
1-Wi-Fi only
2-Wi-Fi + Cellular (3G/4G)
All iPads come with Wi-Fi built in, even the first models.What you need is an iPad Wi-Fi + Cellular (3G/4G) model.
If Wi-Fi only you can only connect to the internet via Wi-Fi networks and you not able to use hotspot. This may be the cause of some people here not being able to see the Hotspot option...
If Wi-Fi + Cellular (3G/4G) meaning that you can connect to the internet via Wi-Fi or a cellular signal (just like cell phones). You just need a SIM card.
The physical difference between the two of them its a black plastic strip at the top edge of the iPad. If its a Wi-Fi + Cellular (3G/4G) it will have it. If the iPad is Wi-Fi only doesn't have this black plastic strip.
Using Hotspot, you can connect just your iPad or you can connect up to five other devices through the iPad. These other devices share the iPad's cellular connection and data plan. But keep in mind that you will consume your data plan more quickly (unless you have unlimited plan) and you may notice slower connection speeds with multiple devices.
Here are the steps to turn on your personal Hotspot and it really works, unless you have an iPad Wi-Fi only.
1-Insert carrier's SIM card in the slot
2-Go to Settings
3-Go to Cellular Data
4-Make sure Cellular Data button is ON. If not just do it.
5-At the Cellular Data menu, Go to APN Settings
6-Now you have 3 boards: Cellular Data, LTE Setup (optional) and Internet Tethering
7-Fill the APN in the Internet Tethering with exactly the same APN wich is in Cellular Data
ex:
Cellular Data APN - gprs.qtel
Internet Tethering APN - gprs.qtel
(No need username or password)
8-Go back to Settings menu. Now at the Settings menu you are able to see an extra setting that wasnt there before called Personal Hotsopt (just between the Bluetootth and Cellular Data menu) called Personal Hotspot.
9-Go to Personal Hotspot
10-Turn ON the Personal Hotspot button.
11-Choose an Wi-Fi password. Notice that you have to look for your shared network using Wi-Fi and/or Bluetooth under the name of your iPad. ex: in my case is PurpleSoul
I hope I've clarified all doubts for you and all others iPad users facing this issue(like me before).
Cheers.