Redmi Note 9 Pro Max MIUI Software Update Tracker [Update: MIUI 12.0.20 with November Android Security Patch] Xiaomi’s Redmi launched the Redmi Note 9 Pro Max in the country a couple of months ago running MIUI 11.0 Global Stable on top of Android 10. Xiaomi doesn’t follow any fixed update frequency for the MIUI Global Stable ROM but on average, the Global Stable ROM is updated once in a month. This post will help our readers in keeping track of MIUI updates for Redmi Note 9 Pro Max (codename ‘excalibur’). Also, check out our Redmi Note 9 Pro Max content, MIUI Updates rolled out for the smartphone so far: