[simonh]

Every now and then, maybe every year or two, my iPhone says it needs to update mobile settings from the carrier. Fo those settings they asked you to change, it sounds like the Indian carriers probably could update them through that mechanism, or possibly that they were going to do so but hadn't got round to it yet.

[webmobdev]

That happens with indian carriers too. From what I understood, Indian carriers don't bother with the HotSpot settings because it is enabled by default for all users at their end. This works fine with Android phones but often not iPhones (in my personal experience).