It means the name contains characters that can't be used, like space, or certain symbols.
its facebook
Invalid Question
it dose not change it
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It means that you are accessing Facebook from your mobile phone.
An invalid is someone who has been injured by accident or disease.It can also be pronounced invalid, meaning not valid, like an expired bus pass.
Mugapphuthagam
biography
The collective noun for characters is a cast of characters.
To talk to your friends on the computer
Games that you play on Facebook.