Looking at T-Mobile's latest free line promotion feels a bit like watching a magician's performance. The trick lands, the crowd claps, you know there is more happening under the stage. T-Mobile's giving away free lines for eligible customers, but the reality is more nuanced than the headline suggests. The service charge is zero, while customers still pay initial activation, taxes, fees, and the free line often does not qualify for equipment discounts. What's really happening goes beyond simpl...
