Iphone Says No Sim Card Inserted

sim card
A subscriber identity module (SIM) on a removable SIM card securely stores the service-subscriber key (IMSI) used to identify a subscriber on mobile telephony devices (such as mobile phones and computers).
(SIM Cards) SIM Cards stands for Subscriber Identity Module Cards. SIM Cards are smart card used in digital phones. They carry the user's identity for accessing the network and receiving calls. SIMs are also used to store Subscribers personal infromation.
The little card used in GSM phones (AT&T, T-Mobile, Rogers, etc.) that connects the phone to the network.

inserted
Place, fit, or thrust (something) into another thing, esp. with care
(insert) a folded section placed between the leaves of another publication
(insert) an artifact that is inserted or is to be inserted
Add (text) to a piece of writing
Place (a spacecraft or satellite) into an orbit or trajectory
(insert) put or introduce into something; "insert a picture into the text"

iphone
The iPhone is a line of Internet and multimedia-enabled smartphones designed and marketed by Apple Inc. The first iPhone was introduced on January 9, 2007.
The Linksys iPhone is a line of internet appliances from Cisco Systems. The first iPhone model, released by Infogear in 1998, combined the features of a regular phone and a web terminal.
A combination camera phone, PDA, multimedia player, and wireless communication device made by Apple Inc