4gb a month is sod all. That's two films. Less than 4 hours use. Good luck if you do the odd train journey or anything else random. But yeah keep talking rubbish.
I do more than the odd train journey and this, along with hotels, is where most of my tethered use is. I use nothing like 4Gb doing this (So actually it seems that provided they do not hike my rate this wont affect me).
You can't steam hours of movies on a train anyway, the signal simply isn't reliable enough over a journey of sufficient length to dictate you might watch a film.
The reason I am with 3 is because they are now the only network who allow tethering at a non-stupid cost. I use probably a few hundred mb of tethered data a month but because mobile networks now equate tethering with people continually consuming extreme amounts of data I have almost zero choice in networks for my very modest tethering usage.
It's like an all-you-can-eat buffet isn't it. Yes, it says all you can eat. Yes, you can have as much cake and chips as you want. But if people turned up every single day at 12pm and sat there until it closed and spent the entire day, all day, every day, consuming food constantly, how long do you think the offer would last?
It's about being fair and reasonable. It was never intended to be a replacement for fixed line broadband or a service to allow people who are paid to sit in a van and watch movies to do so.
As it now seems the net effect is a 4Gb tethering cap and only that, I have to say I'm in favour.
Not received the text yet, though.