I agree to be honest, I think that if you are in contract, you should pay what you have signed up to,
I agree most of the time... but it's only 50p/month
also depends on how long you've had the contract... you'd feel a different if you'd had it for years or if it was new
I know it's only 50p a month, it's no biggy really, it's the principal that gets me.
As to the amount of time you've had the contract, that is kind of my point. The way that these increases should be handled is that they should put them up at renewal time. You agree to 24 months at xx amount. When month 24 is coming up they should say "you renewal is coming up, due to price changes monthly line rental will now increase by 50p from month 25 onwards. Please contact us if you would like to start a new contract". I wouldn't have an issue with these kinds of changes as it'd be the end of the contract and I could easily go elsewhere if I wanted, or take out a different contract, or just happily pay the difference.
I'd have options. As opposed to being stuck with paying the difference unless I want to kick up a MASSIVE fuss, and either give my phone back or pay for it up front...