By Justin Williams Published: 1:03PM BST 05 Aug 2009  Mobile Entertainment reports that it has seen documents which state explicitly that the arrangement will end on October 9 with Orange and T-Mobile the apparent favourites to start marketing the 3G version of the iPhone. The site says that O2 may retain exclusive rights to sell the new 3GS.  The news comes at a bad time for O2 which is facing a torrent of complaints about the data speeds that mobile users are able to get on the iPhone. The handset supports High-Speed Downlink Packet Access (HSDPA) download speeds of up to 3.6 megabits per second (mbps) but hundreds of users have complained on Twitter that they are not achieving speeds of anything approaching that.  A series of tests run by Telegraph staff around London in areas that O2 claims have full HSDPA coverage have achieved download speeds far below 7.2 mbps. In some cases, the speeds have been a fraction of that advertised with figures of just 200 to 300 kilobytes per second common.  On Wednesday, much of O2's data network crashed entirely leaving tens of thousands of mobile users without internet or email access - the third time in a month that it has failed.  Telegraph.co.uk is mapping data speeds achieved on O2's network. If you would like to take part in the survey and add your test results to our map, please email us here. You will need Ookla's Speed Test app which you can download free from the iTunes Apps store and you'll need to be using either an iPhone 3G or a 3GS.  A spokesman for O2 said: "Our 3G network today covers 84pc of the UK population. We have rolled out our network based on where we see demand and usage and concentrate on depth and quality. In addition to coverage, we have invested in increasing data capacity and building complementary capabilities such as 2.5G EDGE, and WiFi hotspots.  "We complete very regular drive-by coverage testing and the speeds we record in London deliver a good experience for email and web browsing.  "Naturally, as data usage grows, we continue to significantly invest to deliver the best end to end service experience possible to our customers. As with all operators, there are several factors affecting the speed a customer will get. This includes distance from the exchange.  "Independent testing has shown that our network is comparable if not stronger than other operators."
On the day that O2's data network crashed for the third time in a month, it    was reported that the Spanish-owned carrier is on the point of losing its    exclusive deal to sell Apple's iPhone.