Orange are allowing contract holders to terminate early due to their recent changes in costs for voicemail/web browsing etc.
My partner received the following text a few days ago, she called Orange and was allowed to terminate her contract straight away (giving 4 weeks notice):
From Orange. From 14 Sep We're changing the cost of mobile internet browsing & come calls not included in your plan.
Full discussion over at MoneySavingExpert.com:
It sounds like people are getting mixed messages when they call Orange, there is a good post on the above forum about the T&C posted on Oranges website though:
4.3 You may also terminate your Contract if we vary its terms, resulting in an excessive increase in the Charges or changes that alter your rights under this Contract to your detriment. In such cases you would need to give us at least 14 days written notice prior to your Billing Date (and within one month of us telling you about the changes). However this option does not apply if:
4.3.1 we have increased the Charges by an amount equal to or less than the percentage increase in the All Items Index of Retail Prices published by the Central Statistical Office in the Monthly Digest of Statistics in any 12 month period;"
Taken from http://www1.orange.co.uk/mobileterms/#4
All T&Cs http://www1.orange.co.uk/mobileterms/