I am looking forward to replace my iOS to either a windows phone, otherwise a blackberry. My major impasse yet, is choosing among AT&T's tiny offerings meant for windows phones. I can decide among the Samsung Focus, which appears pleasant, looks like to run the whole thing pretty fine. I also liked the HTC HD7S, but the only problem is with the constant hiss at some point in phone calls, plus that the camera is fuzzy. Furthermore lastly the HTC Surround as well as the LG Quantum. Which would be the best Windows phone with AT&T's offerings and why?