Cannot upgrade. MX5 stuct in 4.5.2.4A

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2

2016-06-15 18:10

Hi there. i bought my phone in november and i never upgraded. its has the version 4.5.2.4A, i think its not the international rom.
well now i want to update becuase i have problems with google play, i tried international roms.. it say corrupted rom.. i tried chinese roms... it say corrupted rom...  every time i´ve tried to open the update with the mobile, it opened it like a compressed file not a installer.

what can i do?

P.D. sorry about me bad english.