Beijing, Dec 18 : Smartphone brand OnePlus has restarted the rollout of OxygenOS 12 for the OnePlus 9 and 9 Pro. The company said that it concentrated on solving the issues, including the failure to connect to the mobile data in certain scenarios, phone notifications not being visible, freeze issues, some display problems, among others. "This update has reached a few users already and will continue to roll out incrementally," the company said in a blogpost. "We will continue focusing our efforts on improving the software experience and will work on addressing these issues rapidly," it added. Last week, the company halted the rollout of the OxygenOS 12 update for OnePlus 9 and OnePlus 9 Pro following reports of bugs and issues from users. The Oxygen OS update promised to bring system-level improvements and features along with some changes to the user interface. /IANS