Tips Can copy text but cannot paste

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http://androidforums.com – PLEASE help me....... Firstly,Im so annoying as my S3 can copy text but cannot paste...Once I copy the text den i press long only appear clipboard. Last time can paste very well but now only appear clipboard.. What can I do? Secondly,my version now is 4.1.1 Is it this ok? What is the version now?How to do?Any disadvantages? Hope someone can answer me.. Appreciate it:adore: (General)