[Q] How Can I Get Nokia X Platform 1.2.4.3

Hi All I Am Back To The Stock ROM And I Am Locking For A New Update My Nokia X Platform Is 1.2.4.21 And I Want To Get 1.2.4.3 Did This A Downgrade Or Its A Update
Thank You If You Have Reade My [Q] My Phone Is Nokia X PWBASSY RM-980 LIGHT SWAP ENG GLOBAL V2

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