Hotspot tehthering is a carrier feature. If your carrier has nit enabled it in your account, then no iOS update will ever make it appear. So first, check with your carrier that your account even supports the feature.
Hello , pls am calling to ur attention on this persistent heating of my phone , it's becoming unbearable, my iPhone is iPhone 6s , and why am I not having hotspot on display even after all the upgrade
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Heat on my iPhone and not having hotspot