Check out the Kantara report for 12 weeks ending Dec 23rd.
As per the report:
“At the end of 2012 the global OS picture shows Android on top, but clearly the rate of growth it experienced over the past year is beginning to slow as easy wins from first time smartphone buyers begin to reduce."
“Among the handset manufacturers, Samsung has held onto the number one spot in Britain, claiming 35% of smartphone sales, although Apple is now biting at its heels with 32%. Nokia is experiencing something of a turnaround in Britain with its smartphone sales share at 6.2% and actual sales growing by over 50% compared with last year.”