If you have successfully connected to your phone via its hotspot, the top portion of your iPhone will flash blue to show how many devices are connected.
Just in case, we’ve also included a video to show you the same steps, in case you are more comfortable following the steps that way:
Some carriers might not allow you to use your phone as a WiFi hotspot. The answer is simple: some users with unlimited data plans might abuse it and use it as their main internet connection on computers. As we have seen in the past, some users have been more than happy to abuse their unlimited data (when such thing exists).
Some carriers will require you to pay a separate plan if you plan on tethering, or in some cases include it in your plan although you do get a limited amount of data.
Also using your phone as an Internet access with your computer is a good way to blow through your data allotment. Web sites and various media loaded on the computer might not be optimized the same way as websites for mobile, so they can consume more data than expected. Either this can lead to you hitting your data cap quickly, or you can expect a hefty phone bill next month.