OnePlus Nord:
AC01AA tools (international firmware):
android os 10: Oxygenos
AC01BA tools (european firmware):
android os 10: Oxygenos
AC01DA tools (indian firmware):
android os 10: Oxygenos
android os 11: Oxygenos
Download here all Samsung 4Files and Full Repair Firmwares
OnePlus Nord:
AC01AA tools (international firmware):
android os 10: Oxygenos
AC01BA tools (european firmware):
android os 10: Oxygenos
AC01DA tools (indian firmware):
android os 10: Oxygenos
android os 11: Oxygenos