Samsung Electronics said its Galaxy S 3 and Note 2 helped it to defy a shrinking smartphone market in the first quarter, boosting its overall profits by 42 percent from a year ago. The company said Friday its net profit was a record 7.15 trillion won ($6.4 billion) in the period, up from 5.05 trillion won in 2012. That beat its even performance from the fourth quarter of last year, during the lucrative holiday shopping season. Overall sales were up 17 percent to 52.87 trillion won.