Now, OPPO says it has a tri-fold phone in the works with proof to back it up Android CentralOppo tri-fold concept showcased – GSMArena.com news GSMArena.comXiaomi Exploring New Foldable Options With A Tri-Fold Display, Slated To Launch Next Year To Take On Huawei WccftechOppo shows off render of a triple-folding concept phone Notebookcheck.netWe may be at the start of an exciting mobile trend Yahoo! Voices