1.) It's actually only an iPhone related issue, other smartphones can use simultaneous voice and data. Personally, I think AT&T really buddied up with Apple to screw CDMA carriers from this functionality.
2.) That's definitely true. I guess whereas Verizon has LTE almost everywhere at least I live, it's a moot point. I don't need 3G anymore.
3.) Lol, sorry, but no. They are slow, uninformed, rude/don't, speak English and often just credit your account to tell to compensate you for your time.