How to Add a Friend to a Group Chat on Viber for Android
You can add more than one participant to a conversation page. To add a friend to a group chat on Viber and join contacts to chat together, open the ...
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Sometime you need to close some application to free some memory. Android gives you some ways to close such apps
Setting > Applications > Manage Application
Select each application and tap on Stop
One of the advantages of these apps is the ability to close some applications at the same time