Received your Mikeys abt a week ago.

Currently using 1 of the key with my Samsung Galaxy S4 instead. Been using the English app version. There is a 2-3 seconds delay when activating mikey after every reboot of phone. Quite irritating at times and may as well press the icon myself.

However just reinstalled using Chinese version of the app for the so-called stability (whatever that is), no delay. Even upon initialize activation on every reboot. Now Mikey is my S4 is working well and smooth. Have not tried it on my wife's MI3 yet.