Question: Change ROM Lumia 535

[kean5326]

Anyone knows how I can flash the lumia 535 to change the product code and install a Country variant ROM cuz NCS doesn't detect the phone and WPRT & LSRT only reinstall the same rom and i wanna get rid of my operator's personalization... Please help, something like a product code change.

my phone Product Code: 059W9B1 (Claro CO Variant
Wanna Install: 059W7J6 (LTA CV)

Lumia 535 Single SIM RM-1091