UK network Three have released an iPhone and iPad application which lets you get help and support with your device and network and also check your allowance or usage which is a great idea and follow O2, Orange and Vodafone who all offer applications like this,
In fact at a recent Three meetup in London I attended this was something I suggested was a great idea for many users and it looks like other people have recommended this idea too and the company as sat up and listened,
To download the app click the link below or search the App Store for it and download OTA
Link: iTunes Link