1- Download Vivo Y11s PD2402F Flash file 2- Download QPST tool. 3- Install Qualcomm driver. 4- Run QPST tool. 5- Add new port (Check device manager) 6- Click Load XML and browse for rawprogram_unsparse.xml in Stock ROM file. 7- Click Load Patch and browse for patch0.xml in Stock ROM file folder.
8- Select the firmware by clicking in Browser of Search Path. 9- Select Download and wait for the flashing to be finish.