GSMArena - The Xiaomi Mi 4s went official hours before the Mi 5, a teaser of sorts for the headliner. It even made the trip to Barcelona but enjoyed little of the spotlight for obvious reasons. This is the fourth installment in the Mi 4 lineup - hardly breaking news in a week full of high-profile announcements. Yet, we bet the new Xiaomi flagship wouldn't mind repeating the success of a predecessor that spawned quite the offspring.
