1- Open UFS3 setup.
2- Switch off the mobile & connect it by pressing Volume down key.
3- Select CPU type DCT4.
4- Select Product RM-305 1650.
5- Select the Dropdown above start & click on check.
6- When both the boot are successful, the click on Write flash.
7- When flashing is completed, mobile will reboot.
8- Select UI option & click on UI setting.