How many replacement D3s do you have to go through before they consider replacing with a new phone? I just got a 3rd replacement that arrived with the hard keyboard space bar unresponsive (same reason I returned the 2nd) as well as the slider screen wobbling between the shut and fully open point while with an odd/loose feeling while sliding it (and the store rep tried to tell me that was normal.. I had the 2nd phone in hand and demonstrated how it wasn't.) In short, the 3rd replacement was worse the the 2nd. 4th one is on the way. Is there a better way to go about it such as calling instead of going to the store? Getting an endless chain of refurbished phones isn't acceptable.