Used to be a thing with O2 here in the UK. My iPhone 3G (so, 2009?) was affected so I had to install an app that allowed me to tether.

UK Person here, so I think it's my duty to point out....don't buy heinz beans as they're yucky!

think of it more like a switch that makes that part of your keyboard multi-use.

You can buy keyboards that cut off that entire section if you don't use it.

Sith vibe check passed