EE has unveiled its latest weapon in the fight to keep it top of the 4G pile - shared data.Ok, being the only 4G network helps it be top dog, but the company doesn't look like it wants to hand over the crown in a hurry. We have expected new deals to tackle the incoming competition later this summer, but perhaps not this deal.The network hasn't given any details of how this would work, just that it would allow you, the customer, to share phone, text, and data across any phones and tablets hosted on your plan. It does happen in the US right now, but not so in the UK. Sounds like a good idea - unless your kids wipe out the allowance with movie downloads in the opening couple of days. We suspect the detail will arrive at a similar time as the Vodafone and O2 price plans, hopefully with safeguards against one person splurging all the data in hours.EE has also announced it has hit the 500,000 mark for customers, adding that it will be offering upgraded double-speed 4G in ten cities across the UK in the coming weeks. If you are in Birmingham, Bristol, Cardiff, Edinburgh, Glasgow, Leeds, Liverpool, London, Manchester and Sheffield, you are in luck, with speeds of up to 80Mbps, compare to the current average of 24-30Mbps.Finally, by the end of June EE will cover 55 per cent of the UK, with an aim of 98 per cent by the end of 2014. 4G coverage will soon be available in Aberdeen, Bath, Bournemouth, Brighton, Cambridge, Ipswich, Middlesbrough, Northampton, Norwich, Poole, Plymouth, Portsmouth, Swansea and York via EE, so if you are in those areas and fancy it, head to your local store now and get your order in.