Both Verizon and AT&T have recently dropped the price of their unlimited voice plans from $100 to $70 a month. While we (we being the tech media) generally assumed that the price cuts were an attempt to lure more customers. We tend to forget a few days after their conference calls that the #1 and #2 US cellular networks are having no trouble picking up and retaining new customers, even with their rates considerably higher than #3 Sprint and #4 T-Mobile (T-Mobile is at least still gaining subscribers, unlike Sprint). So why the price cuts?