Shares of Research In Motions (RIMM) are tumbling $18.93 or 19.41% in after hours trading, after the company reported 2009 second quarter results for the three months ended August 30, 2008 Thursday 09/25/08 evening.

Revenue for Q2 2009 was $2.58 billion, up 15% from $2.24 billion in Q1 and up 88% from the $1.37 billion that the company reported in the same period last year.

According to the company, the revenue breakdown for Q2, was approximately 82% for devices, 13% for service, 3% for software and 2% for other revenue. The company shipped approximately 6.1 million devices in the period.

Net income for the quarter was $495.5 million, or $0.86 per diluted share. This compares to $482.5 million, or $0.84 per diluted share in Q1 and net income of $287.7 million, or $0.50 for each diluted share in the period last year.

For Q3 2009, Research In Motion (RIMM) is guiding as follows: “Revenue for the third quarter of fiscal 2009 ending November 29, 2008 is expected to be in the range of $2.95-$3.10 billion. Net subscriber account additions in the third quarter are expected to be approximately 2.9 million.

Earnings per share for the third quarter are expected to be in the range of $0.89-$0.97 per share diluted based on a gross margin of approximately 47% and operating expenses that are 1-2% lower as a percentage of revenue than in the second quarter.”

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