Since updated from iOS 7.1.2 i am unable to send SMS to people who have iMessage. While wifi and mobile data is off still iMessage keeps being blue. On iOS 7.1.2 it was enough to switch off internet connection to send SMS. BUT this can also happen on iOS 8.3, only if i switch on "Send as SMS" option. What i dont like on this option is iMessage can turn to SMS automatically when there is time out. I have tried to soft reset, erase all settings and restore, set as also new iPhone and clean restore but nothing helped. So, is this an iOS 8.3 bug or something normal or only i have this error ? Any suggestion ?