Re: Change in contract terms ?
"It's always been cheaper to get on a plane and talk face to face than use a mobile phone OOB"
That's not true. When GSM mobile phones first became common, the out-of-bundle charges were reasonable, and the bundle was just there to pay for the phone and/or give you a discount.
The modern approach of "if you use over your bundled amount then we're going to charge a punitive amount" came later.