Xia Xin's dancing mobile phone is red.

① The expression is wrong, and the expression of "developing low-price competition" is improper;

② ③ According to the meaning of the question, "Xiaomi mobile phone subverts the traditional sales model, creatively promotes Internet sales, greatly reduces marketing costs, and provides consumers with low-priced mobile phones", which has implications for enterprise management: enhancing the awareness of independent innovation and improving the management level of enterprises; Make a correct business strategy and seize the development opportunity of "internet plus";

It doesn't matter. "Improving product quality and satisfying consumers' individual needs" has nothing to do with materials.

Therefore, this question chooses C.