MBP airdrop doesn't work from/to iPhone
I have latest 2013 MBP 15" retina display (Yosemite), Iphone 5s (IOS 8.3) and iPad air 2 (IOS 8.3).
Problem is airdrop connection because I have problems from MBP to other devices, while among iPhone and iPad it works fine.
MBP often doesn't find my iPhone or if It finds it connections passes to waiting state and nothing happens, sometimes connection is lost (airdrop device icon miss!)
If I go to 'finder' in airdrop section, iPhone icon doesn't appear or it occurs much time. I'm sure to follow right procedure infact among iphone and ipad it's ok.
Sometimens I succeeded to send file but I cannot understand how it worked!
I tried to signo out iCloud account from MBP and I signed it again but nothing.
Suggestions!?!?
MacBook Pro with Retina display, OS X Yosemite (10.10.3)