** BT shares jump more than 5 pct after sealing dealto acquire EE for £12.5 bln ($19.04 bln) & marking its return tothe mobile market
** Shares, by far the top performers on the FTSE,back to levels last seen in 2001 when it spun off O2
** About $82 mln traded in the stock, volumes nearly equal afull day's average within first 2 hours
** Dovetailing of 4G network with fibre network revivesrivalry with Vodafone
** EE's 4G customer base up to 7.7 mln subscribers, beatingits 6 mln end-of-year target
($1 = 0.6566 pounds) (RM: vikram.subhedar.thomsonreuters.com@reuters.net)