airdrop: Iphone 5s iOS8

Dear

Both my iPhone 5s and Ipad air are running iOS8.

Today I have installed the Yosemite update on my retina Macbook pro 15".

My iPad and Macbook can send files to each other using airdrop. They also have the ability to send files to my iPhone 5s.

But when I want to send a file from my iPhone to my iPad or Macbook, the iPhone does not see any of the devices online.

Fyi: airdrop is enabled on all 3 devices and is visible for 'everyone'.

Thank you in advance