Smartphone penetration within the US rose to 58 per cent in the course of the three month period ending March 2013, in line with data from the comScore MobiLens service. That’s a complete 136.7m smartphone owners – a rise of nine per cent from December 2012.

Not much has changed at the manufacturer and platform fronts, with Android still holding most people OS share, and Apple retaining its position because the single premier OEM.

Apple did actually strengthen its position significantly in the course of the period, however, growing its share by 2.7 percentage points to 39 per cent. This came no less than partially on the expense of Android, which saw its market share fall 1.4 per cent to 52 per cent.

Of the Android-focused manufacturers which make up the remainder of the end five behind Apple, only Samsung saw growth – up 0.7 per cent to 21.7 per cent, holding second place. HTC (down 1.2 per cent to 9.0 per cent), Motorola (down 0.6 per cent to eight.5 per cent), and LG (down 0.3 per cent to six.8 per cent) all held their previous positions inside the list, but lost market share.