Yes, if one means, "will it impair the navigation or communication capabilities of my electronic equipment?" But the PIC does not determine if it is legal, and "safe" means more than electronic interference.
http://rgl.faa.gov/Regulatory_and_Gu...4?OpenDocument
http://www.faa.gov/news/fact_sheets/...fm?newsId=6275
http://www.fcc.gov/guides/wireless-devices-airplanes
http://dwiwatch.org/cell-phone-texting.php
http://www.bookofodds.com/Accidents-...More-Dangerous
www.dwiwatch.org/A-Comparison-of-the-Cell-Phone-Driver-and-the-Drunk-Driver.pdf
As an EMS pilot whose crews sponge up the results of inattention to task caused by booze, drugs, phone calls, and texting, I tend to agree with those studies. But that's just my opinion. We're each entitled to our own opinions, not our own facts.
Pay attention to the view out the window. Your closure rate with descending opposite-direction traffic at 7500"msl might be 500kts.
Your mileage may vary.