After months of not having good coverage (since Nov '11) on two handsets I put in a complaint to the TIO on 21/2/12. Got the call today from the resolutions team and despite all the previous advice from the carrier that there was nothing wrong with my service and that "investigations had been conducted and not discovered an issue" they finally conceded that by looking through my call history and history of complaints that there was an issue and immediately agreed to cancel the contract. I didn't have to argue or repeat anything to get there it was basically a walk up start. For anyone else having issues I would suggest the following: 1. send the carrier an email each and everytime you have an issue and provide the number that dropped out/you have tried to call/text or website you are trying to access and the location you were in when trying to call/text/access the network. They love every single bit of detail. 2. unless you really need the $$$ resist the urge to accept a credit to your account and a promise that things are being worked on and will get better shortly. I did this initially and I think it lead to my complaint being centred around money rather than a genuine issue with the network. 3. dont be reluctant to make a complaint with TIO it only takes a couple of minutes online - this is my second complaint to the TIO (one with Optus this one with Vodafone) and essentially all they do is send your complaint on in full the carrier - don't know what they do past that but the carrier seems more than willing to agree to your proposed solution when it comes through this channel even when you've made the same offer directly to them a thousand times before. Hope this can be of benefit to some others out there - I can tell you I feel enormous sense of relief knowing that I can move to a network that will actually work.