Yes - I do have unlimited internet on the phone in the UK - obviously using abroad will cost. I use the phone every day on the internet for emails etc.
I used it tethered for a short time and I used it abroad for a very short time - both in the same month - and there where some charges but I just assumed that the charges where for the abroad use. The bill did not say explicitly - just said 'extra data charges'.
But I was reading that Orange where charging iphone users for tethering - see post no.13 here http://forums.macrumors.com/showthread.php?t=671551
So because of this I rang Orange and after being put on hold for a while I was told tethering was £3 per Mb. I have searched the Orange website and I cannot find any mention of this charge - in fact 'tethering' is not mentioned at all AFAICS. I upgraded over the phone to this tariff and it wasn't mentioned then - but there again I never asked the question when I upgraded.
I have been reading other forums mentioning tethering charges -mostly in the USA - that have differing opinions - some say the provider cannot tell and it is just usage that is flagged and indicates that you must be tethering eg. if you do huge downloads because on a phone you would not do that.
So I am still bit confused really.
Interestingly, for O2, according to this http://www.allaboutiphone.net/2009/0...rd-of-caution/
tethering is NOT allowed unless you pay extra per month. The post is about iphones again but read it all and it says it applies to all O2 phones in their T&Cs. So maybe they just assume you are tethering because of the usage and then charge. How much tethering do you actually use? A lot? A little?
I am surprised no one on here can answer the question if it is technically possible for the network to tell if you are tethered or not.
Any of you tech wizzkids know any more?