why does my Samsung galaxy s4 always says sim card removed when it hasn't been touched

[AC Question]

when I go to use my fone it says sim card removed restart. when I do it comes up saying no sim card. tried putting new sim card and it says the same

 

[abdo123]

its probably not fit in its place
maybe its too small or maybe it is moving inside the space provided...check if it is moving inside by shaking ur phone...or opening the space..if it is then try to buy another one...or ask a shop to fix it for you....the thing is that maybe the sim card doesnt fit just right in the space provided