"User 0" message displayed on notification bar of android KitKat I recently upgraded my Lenovo P780 to kitkat and yesterday applied an update from Lenovo "P780_ROW_8G_S222_140817". After applying this update, I have started seeing text "User 0" in the notification bar (next to the setting icons on right top corner) and additionally, U0 text is displayed in the notification area below the icons.
I am not able to cppture screen for the notification area hence unableto attach the screenshot.
Does anyone have any idea on how to remove this text or is this a bug with the new update?
This is a "feature" on the update for the Lenovo P780 I'm afraid. Other users are reporting the same issue (amongst others) with the device. 

User 0 is the "first" user on the device, i.e. the "administrator" profile. You could then add subsequent profiles (1, 2, 3) etc for other users of the device. This information is not usually displayed. 

You can read the  support thread here  on Lenovo's support forum. 

Example:

Post from Kannanovo (user on Lenovo forum)


  I have "User 0" and "U0" in the notification bar i don't know whether this is an issue, 


And there are others there. 

The reply from Lenovo, last dated the 22th August 2014 (which is the date I'm writing this) follows (from  page 7 )


  Hello there, 
  
  Thank you for all your information. 
  We are analysising all the issues received, some of you might have received separate email or message for further information. Please do help us to collect the details, that is very important for us to root cause your issues and provide correct fix in further update. 
  please drop you issues here or email me. We will work hard and try our best to give our customer best experience. 
  Thank you for your patience and cooperation. 
  
  Wang


As Dan mentioned  another user posted a similar question  without enough detail so I would imagine this new 'feature' is common enough.