JiaYu launched their JiaYu G5 last year with their usual choice of Lewa ROM. Since then a few custom ROMs have emerged for this high-end stainless steel handset, but none so excitant as the latest version of miui V5 for the phone.
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The current version of MIUI V5, version 4.2.7 is based on Android 4.2 and can either be updated via the OTA updater (if you already have the older version of MIUI on your G5) or by downloading and installing it manually from the official MIUI ROM page.[ Source ]