OnePlus Ace 3, which is expected to be the successor to the OnePlus Ace 2, will debut in China on January 4. The company has confirmed that the phone will be offered in three colour options. The phone is scheduled to launch globally, as well as in India, as the OnePlus 12R on January 23. In several teasers on a microblogging site, OnePlus has revealed some key specifications of the upcoming handset, including bezel size, screen and…