Came across this interesting article from July 2011 showing the companies supplying GaAs for Apple's iphone. TriQuint and Skyworks had been, and Avago was added in 2011.
Interesting to fast forward to today, Blevins in the Poet House, the merger of TriQuint and RF, (DeBonis to Poet), Avago merging with Broadcom,(both are Apple suppliers), Poet COO from AMAT (another Apple supplier)......
http://iphone.appleinsider.com/articles/11/07/13/apple_continues_to_align_suppliers_for_production_of_fifth_gen_iphone