Anybody switch over to Charter mobile at $45/line per month? I am sick of paying AT&T almost $400 for my service. I have heard horror stories about TMobile, but reasonably good things about Verizon and Sprint, but neither of those save enough to deal with. Does Charter have their own cell towers or do they piggyback off other companies? Thought I'd ask as so many of you are so much more tech savvy than I am.