Only until you get the bill for the data traffic from your phone provider just like the lady in Florida whose son racked up US$250,000 on a trip to Canada!
The problem with that is they live in the U.S. and her son (I think it was actually her two brothers who are deaf) were visiting Canada so it falls in line with international roaming. They were surfing the net, email, text messages and the biggest issue was streaming content of some sort. They did reduce the bill but I think it was still in the $2,500 range.
An Android based phone. No one said anything about tethering with an iPhone because if I had an iPhone I would have done so with ease. Lastly, Why would I pay a monthly fee with the 3 cell phone carriers for some stupid plan when I can clearly once again, tether my phone to it for FREE!!!!!!
Regardless if it's an android or iphone tethering has been going on for a long time now and it's nothing new. Not sure which carrier you're with but if they catch you tethering, you may see an increase in your bill. They offer tethering plans for this specific purpose; the way they look at it is you hacked your phone to get around the charges and they consider it stealing service so just be careful when doing this.
Sorry I get unlimited data with sprint
I have unlimited data with AT&T on my iPhone as well (grandfathered) and I'm not supposed to tether. I know it's silly, I have unlimited data so I should be able to use it however I want (any data package for that matter), but they view tethering differently... probably because they can milk you for some more money.