Why can other people connect to my wifi but I can't use it myself? Yesterday, I was out with my boyfriend and I turned on the wifi hotspot on my phone and then he connected to it perfectly fine and browsed the internet without a problem but I myself can't use my own hotspot. Am I doing something wrong? does the mobile data have to be open for me to use the hotspot?

What do I do? It's like my friends can use the internet on my phone but i cant? :\