It annoys me when my mobile fails to send. It forces me to acknowledge a number of warnings that something has been sent successfully: but that should be the default ! I should be able to assume that it went ok without the hassle of clicking 'ok' two or three times each text. But if it fails to send it just sits there when it ought to be alarming about how it has failed miserably !
(To rub salt on the wound, I can ask to exit and see no more positive acknowledgements for that text; but if I do so it simply asks me to confirm I want to exit ! So what was the blessed point ? Really, where do these handset "designers" "learn" design ?