Great news for Xiaomi’s very popular Redmi 1S Smartphone users; Xiaomi has finally started rolling out the most anticipated MIUI 6 global stable build V6.6.1.0 update for this budget friendly Smartphone. Users will be able to receive the update Over-The-Air (OTA) in the next few days.

"MIUI 6 for Xiaomi Redmi 1S"

The MIUI 6 update is based on Android v4.4.4 (Kitkat) and it is 642 MB in size.

MIUI 6 for Redmi 1S complete Changelog

New – Added flash notification light for incoming calls (Call settings – Incoming call settings – Flash when ringing) (04-23)
New – Added Interactive Voice Response (IVR) shortcut feature for India (07-01)
Optimization – Optimized answering button icon of Internet calls (04-21)

Fix – Add contacts to blocklist function disappeared (04-22)
Fix – Sometimes, search contacts function could not be used (04-22)
Fix – Dial button UI display error for dual-SIM devices (04-29)
Fix – FC error after checking SIM card storage (05-12)
Fix – Contacts app might not respond after logging out of Xiaomi account (05-12)
Fix – FC error caused by using single quotation marks when searching (05-21)
Fix – Lagging/ FC errors when importing or deleting SIM card contacts (05-27)

New – Report junk messages feature (05-13)
Optimization – Optimized SMS conversation page UI style (05-12)
Optimization – Optimized contacts’ namecard UI in messages (05-13)
Optimization – SMS delivery status can be updated more quickly (05-28)
Fix – Contact info in SMS displayed incorrectly after switching language (04-14)
Fix – Deleting audio messages might cause FC error (04-14)
Fix – Contact info at the conversation page top left corner might overlap (04-14)
Fix – MMS that were not sent could not be resent (04-14)
Fix – Unsent SMS could not be sent automatically after Airplane mode was disabled (04-24)
Fix – UI display error when editing message recipient (05-13)
Fix – Mi Band ‘Vibrate for notifications’ feature did not work after receiving a MMS (05-20)
Fix – Messaging app would stop responding if there were too many receipts when sending group messages (05-20)
Fix – Sometimes Slideshow messages could not be sent (05-27)

[Lockscreen, Status Bar, Notification Bar]
New – Added hotspot icon in status bar when portable hotspot is enabled (05-19)
New – Added charging icon in status bar (05-19)
New – Support displaying virtual network operators’ names (05-19)
New – Lockscreen music control (05-27)
New – Added unlocking gesture recognizing mechanism to avoid unlocking caused by misoperation (06-02)
Optimization – Launching speed of notifications managing page (05-27)
Fix – Sometimes, long pressing notifications directed to the wrong app (05-06)
Fix – Sometimes, Gaussian Blur effect did not work when pulling down notification shade (05-12)
Fix – Sometimes, operator information displayed incorrectly for dual-SIM devices (05-12)
Fix – Sometimes Mi Band could not unlock screen (06-01)

[Home screen]
Fix – Icons were disappeared when opening folders in Mi Space (04-16)
Fix – Home screen wallpaper was enlarged after OTA update (04-16)
Fix – Locking apps had error when entering Recents page for the first time (05-12)

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Fix – Sometimes SD videos’ previews were stretched (06-11)
Fix – Sometimes, HDR button displayed status incorrectly (06-11)

New – Sort music by name, date, and language in ‘All songs’, ‘Offline’, and ‘Favorites’ list (04-15)
Optimization – Added album names in music list (04-15)
Optimization – Album cover on playing page was set as small by default (04-15)
Fix – Volume would decrease if new songs were added to the current playing music list (04-15)
Fix – Lyric playing status was incorrect after skipping a song (04-15)
Fix – Listening to local music could choose streaming quality (04-15)
Fix – Part of playing page background was transparent (04-15)
Fix – Display error when entering playing page (04-15)

New – Share weather condition images. Support sharing images of selected modules (05-06)
Fix – Sometimes, weather animations displayed abnormally (05-19)
Fix – Sometimes, city weather background was black (05-27)
Fix – Weather animation displayed incorrectly sometimes (05-27)
Fix – Sometimes raining animations did not change directions according to gravity sensor (06-02)
Fix – RAM leak caused by sharing weather conditions (06-02)

New – Added transition animation when connecting WiFi (05-21)
Optimization – Apps notification will not ring in Do not disturb mode (04-16)
Fix – Sometimes, unlock with Mi Band did not work (04-29)
Fix – Sometimes, incorrect WiFi password prompt did not show after a long time (05-21)

[File Explorer]
Fix – Files in WiFi router could not be opened (04-14)
Fix – Lagging issue when loading thumbnails (05-21)

New – Contacts managing feature (05-12)
Optimization – Support retrying if failed to download email content (05-12)
Fix – IMAP and POP3 accounts could not open zip type attachments (05-12)
Fix – UI error when using large font (05-12)

Optimization – Optimized address bar height (05-26)

Fix – Recording completed notification did not disappear after pressing the notification to enter Recorder (04-28)

Optimization – New events can be created without titles (05-14)
Fix – Editing reminders might cause Calendar to FC (04-21)
Fix – Sometimes, weather condition displayed incorrectly in Calendar (05-28)
Delete – Removed Dismiss button for events notification reminders (06-02)

[Clock / Calculator]
Fix – UI display error when using large font (05-19)

Fix – Sometimes lockscreen notifications displayed data usage incorrectly (07-01)

[Mi Cloud]
New – Alarm clock settings can be restored from Mi Cloud when switching to new devices (05-19)
Optimization – Optimized Mi Cloud settings page (05-19)
Fix – FC error in some situations (06-08)”

If you can’t wait for the OTA update then flash the update manually by downloading the Official ROM from here.