Xiaomi Mobile 4 was released in Beijing at 2 pm on July 22, 2014. The Xiaomi Mi Mobile 4 mobile 4G version was officially launched on the Xiaomi official website at 12 noon on September 9, 2014, and the price is still 1999 yuan. On November 7, 2014, Unicom 4G version of Xiaomi mobile phone 4 released, supporting TD-LTE/FDD-LTE/WCDMA/GSM. On January 27, 2015, Telecom 4G version of Xiaomi 4 mobile phones were opened for purchase.
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