Problem in BlinkUp

I have Xiaomi Mi mobile phone with me, When i tried BlinkUp with following the instruction given on electric imp site,I could not able to do so.
When I tried same procedure with my friend’s Samsung mobile phone,it worked clean.
Please help me out here.

Did you try again after the imp had connected (and upgraded its OS)?

Which version of Xiaomi Mi? We don’t have one of those to test with but have not had any issues with others like the OnePlusOne, Samsung, HTC, LG, etc