[Q] Micromax A88 Android 4.2.2 Stock Rom ?? topic

On this page http: // androidxda.com /download-micromax-stock-rom-models (sorry link has space inserted because of xda rule for new member). I have found Android 4.2.2 stock rom for micromax A88. Is this official stock rom(or has anyone tested it even if it is not official) :confused: ?? 'cos service center of micromax said their is no upgrade for micromax A88.
One more question is there any other > android 4.4 custom rom for micromax A88??