In other not to flash wrong model and get your infinix x600 brick You most know how to identify your model . That will guide you the right firmware to download for your phone without getting it hard brick.. I will also write shorlty how to get hard brick x600 back alive.
X600-H533-A1 – 16GB + 2GB:-
Version: 5.1 up gradable to 6.0
X600-H532-A1 – 16GB + 1GB
Version: 5.1 up gradable to 6.0
X600-H533-B1 – 16GB + 2GB:-
Version: 5.1 up gradable to 6.0