The fairest way would be to bring this in for all new users, and then force existing contract holders to change tariff at the end of the contract, whilst honouring the agreement until then.
Agreed.
To those upset by this, how much were you using? And what media were you watching?
I struggle to see how 3gb a month on 3G is even needed!
I'm upset by this, I don't really go anywhere near 3gb to be honest but I probably do go over the 500mb on occasion. I use iplayer and youtube sometimes, but not very often. Spotify would probably be the biggest data use app I have, having unlimited music in my pocket is amazing. Why should I have to worry about how much data I am using and not be able to watch that odd program on iplayer because I might not be able to listen to music for the rest of the month?