Spreadtrum (SPRD) raises its Q2 revenue guidance range to $270M-$278M, well above a prior range of $220M-$228M and a $224.1M consensus. The Chinese baseband chipmaker cites "continuing strong demand throughout the quarter for low-cost smartphones" in China and other emerging markets, and says it's "also benefiting from the continuing expansion of our smartphone portfolio." Those were a couple of the positive catalysts SA Pro contributor Ashraf Eassa recently mentioned in a bullish write-up. Shares are halted. Marvell (MRVL), which competes with Spreadtrum in the TD-SCDMA 3G baseband space, is up 1.8% AH.