The Xiaomi Mi 4c may shed its unofficial status by the end of the month - the latest rumor is that the third Mi 4 version will be unveiled on September 22. The phone already passed through TENAA and benchmarks, we even saw its box. It will feature a more powerful chipset than the Mi 4i - a Snapdragon 808, up from 615 - but the rest seems largely unchanged. The camera setup will remain 13MP on the back and 5MP on the front though video capture resolution is uncertain. It could match the original Mi 4 at 2160p or stay at 1080p like the Mi 4i (the 615 chipset can't do 2160p, but 808 can). One relatively big change is the move to USB Type-C, which is slowly gaining popularity. The Xiaomi Mi 4c is will be a dual-SIM phone with LTE, no microSD slot, a 5" 1080p screen an MIUI 7 on top of Android 5.1. The expected price is CNY 1,300 (about $200) and China will get it first, rolling out to other regions where Xiaomi is active later...
Source: http://www.gsmarena.com/xiaomi_mi_4c_may_launch_on_september_22-news-13923.php