Tested On MIUI 9.6
Open UFI Android Toolbox
1. Qualcomm >> Redmi 4a(rolex)
2. Identify >> Firmware Rolex UBL >> Write Only Modem + fsg >> Write
3. Turn On Riva
4. Diag Mode: *#*#13491#*#*
5. Tab Service >> Redmi 5a
6. Fill IMEI + Load QCN File
7. Write, when finish retart Riva
8. Cek Imei
9. Back Riva to EDL Mode,
10. Open UFI Android Tools >> Qualcomm >> Redmi 5a(riva) >> Identify
11. Load Firmware Global Riva >> Write Only Modem >> Write
12. Done