my M3 note is on 5.1.3.1 G. which is the default OS receveid when i bought it.

Till now i have not received any Update.

I see M3 Note users talking about different OS higher than me.

5.1.3.2G , 5.1.3.3 G.

1. Please let me know if this is version official version received with the Phone. ?
2. if this is the manually update OS.?
3. Can you share the OS if it is official received OS.
3. Also let me know if its manually updates OS, help me with the link.