Now, as per a GizmoChina report that quotes Zhang, he reportedly purchased Xiaomi's Mi 5S Plus after going through the official Xiaomi website and reading about the fact that a stable MIUI software update would be seeded to enable users to harness the complete functionality set of NFC. The feature set in question is the ability to use the Mi 5S Plus to make bank payments and for other cashless services such as paying for metro, bus rides using the MiPay functionality.
The above features, even though officially announced by Xiaomi, were not available to all Xiaomi Mi 5S Plus buyers, as these were slated to be made available for everyone through a stable MIUI 8 software update, which should have been seeded by now. However, users have not reported to have received this MIUI 8 firmware enhancement.
As per GizmoChina, Zhang highlighted these aspects in an official letter sent to Xiaomi. He also reportedly sought full refunds from the company for having not yet released the MIUI 8 update. At this point in time, the concerned court is yet to come out with a verdict.