It is not just the gas and electricity firms with large price rises, it seems the mobile phone networks are in on the game too. Vodafone has published on its website changes to its price plans for pay monthly users. Currently most Vodafone mobile phone plans include 500 to 750MB (MegaBytes) of data allowance, and are charged £5 for every 500MB they use above this. This is set to change to £5 for every 250MB.
For those who only just go over their allowance, e.g. use an extra 50MB in the month they will see no change, but users who exceed their allowance by over 250MB will see a big change in their costs. For example a user using an extra 600MB will pay £15 as oppossed to £10. Someone using 300MB would see the cost rise to £10 from £5.
Generally most of the content people use on smart phones is relatively small in terms of datasize, e.g. twitter and Facebook, but if the phone has an app store it would be wise to turn off automatic updates on purchases, since updates to apps can be large and are best carried out over Wi-Fi to avoid excess data charging.
The pricing for tablet data usage appears to be different. With Vodafone, data plans for the iPad2 and Samsung GALAXY Tab 10.1 include 2GB (GigaBytes) of UK data, with extra costing £15 per GB. For lighter users, there is an option of 500MB of inclusive data and £7.50 for every 500MB above that.