proximity key and iphone
 

is it ok to keep the proximity key next to my iphone? i know sometimes electronics kept next to each other don't mix well, but i need to keep them together at work.

My iphone is always in my right pocket, key in left. Reason why i separate them is cause i dont want my phone/key getting scratched. They both work together anways.

I found if my Nexus 4 and key are in the same pocket i cant start the car had to move phone away before the light would go green to let me start it, but just sitting beside each other not around the car would be fine.