i bought one month back 5s gold, and now i got first bug , which is on top 'NO SIM', could you please help me on this, why this massage came.

This is a user-to-user technical forum. There's nothing for us to 'look into'. If you want to talk to Apple Support, call 1-800-MYAPPLE or go to getsupport.apple.com.

Follow the steps of the article you were just reading. If the steps in that article do not resolve the issue, then either get a replacement, known-good SIM card from your wireless carrier, and/or contact Apple Support.