I am using openParentApplication:reply: method to communicate to iPhone using Apple Watch. everything goes fine except that if i lock the iPhone Simulator a message appears on Watch simulator "unlock to activate" where i cannot press the button on watch app to send the message to iPhone
i've had the same issue using the iPhone simulator on iPhone 6 iOS 8.3 as well as iOS 8.2 (different betas of xcode)
notice that iOS 8.2 beta 3 release note mentions the following:
(WKInterfaceController methods: openParentApplication:reply: now launches the containing app in the background when the iPhone (or iOS Simulator) is unlocked or locked)