Did you miss the announcement? Don't worry, you haven't missed a great deal, depending upon how you use your phone.
This new MVNO operates on the Three network and has only one tariff, which makes things simple:
Pay £24.99 every month on a rolling service (no contract) and you'll get unlimited minutes, unlimited texts, unlimited ad-free ROK music and 4GB of data. If you can get Three's 4G coverage, this is included in your plan by default.
The main selling point here is ROK Mobile's own music streaming service, which you can stream over the network as much as you like, so if you like to use unlimited data for streaming music, this network should be worth a look.
However, 4GB of data is ample for most people, but I'm not so sure that the heavy streamers will be happy with this rather low allowance - Maybe Three's data is reaching capacity (hence their unlimited data bundle price hike that I mentioned in a post yesterday).
Why would you forgo unlimited data and give up on streaming from all of your favourite music sites and apps? ROK Mobile's music library will have to be absolutely superb to justify the £24.99 monthly fee.
At this stage, there is little mention of which artists or music is available to stream and/or download, but I doubt that it will rival Spotify.
You can take a "test drive" of the service for £9.99 for the first 30 days. The caveats are that you only get 250 minutes, 500 texts, 500MB of data and the unlimited streaming of ROK music lasts for the first two weeks. Without porting your number in, this has to be a pretty disposable tenner that you just wanted to get rid of.
Importantly the service is for Android and iPhone only, and I wouldn't expect it to migrate to any other platforms for a while yet.
Given that unlimited data in the UK is becoming hard to find, if you really enjoy streaming music on the go, then this network is definitely worth a look, though if it doesn't have your favourites in its library, you may be very disappointed.
Other than this, it is a fair allocation of minutes/texts and for some people, data, and it does work out cheaper than an unlimited SIM only plan or monthly PAYG bundle + Spotify subscription. The trouble is that there are now so many other players out there. You could stream internet radio and your entire music collection through Google Play Music for free and simply stick with an unlimited data plan, so I hope that ROK Mobile have plenty of tracks ready to play right from the start.