Because the hardware is shared with the international R11, it is theoretically possible to port software, but the "st" variant has a locked bootloader that is notoriously difficult to bypass compared to the standard model. The Reality of a "Global ROM" for R11st

Oppo R11st Global Rom [work] [Proven Honest Review]

Because the hardware is shared with the international R11, it is theoretically possible to port software, but the "st" variant has a locked bootloader that is notoriously difficult to bypass compared to the standard model. The Reality of a "Global ROM" for R11st