Qualcomm (QCOM) - Get Report was up 2.5% in preopen Instinet trading after Credit Suisse First Boston raised its rating on the stock to buy from hold.

In a research note, CSFB said it expects the wireless technology company to continue to gain market share in handset chipsets, adding that

Motorola

(MOT)

will soon begin shipments of products using Qualcomm technology.

CSFB cited indications from Korean service providers that 50% of phones sold in July used Qualcomm's technology vs. 25% in June.