T-Mobile guaranteeing best trade-in values on used smartphones and tabletsT-Mobile announced a new promotion today that vows to offer consumers the best trade-in value for their old mobile devices. Just in time for tomorrow’s big announcement, the magenta-colored carrier’s new marketing ploy guarantees the best trade-in values for your used wireless equipment compared to offerings from Sprint, Verizon and AT&T. If you happen to […]<img alt="" border="0" src="
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T-Mobile guaranteeing best trade-in values on used smartphones and tablets
