(And if you're curious, most LTE implementations use OFDMA. Mathematically it's a lot like CDMA, except using orthogonal frequencies instead of orthogonal codes. The orthogonality is what allows you to pick out a specific phone's signal even though all phones are transmitting simultaneously.
That's really not at all true. Here. OFDMA just increases the usable frequency range for FDMA, which splits users into different bands (channels). In CDMA all users take a lot of bandwidth and the receiver filters them out using codes or somesuch.