Clone Nokia 1280 flashing help required

I received Nokia 1280
According to back sticker its RM no t as nokia’s RM 647 its rm in 4 digit
I think this is clone Nokia 1280
Anyone idea how to know this is MTK base phone or original Nokia
And how to detect its pinout should I use rx tx method on board soldering
There are 7 pinout as on original one .