Chipmaker TriQuint forecast weak revenue as BlackBerry dials down

I don't understand something. TriQuint makes chips for Apple, Samsung and Blackberry yet their losses are due to Bb's low sales? Are the Bb people not buying iPhones or Galaxy's? How do you make a loss when people are merely changing/shifting which of your clients they use? Surely you still make their competitors' chips?
My knowledge on this is rather limited so someone educate me please.
 
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