IPhone 4s not reading sim card?

I just got a Straight Talk sim card for my unlocked iPhone.ST is in the process of porting my number, but my iPhone says "no sim" in the top left corner. I just want to know if this is normal for an unactivated sim card or if there's a problem with the sim card itself.

Since the SIM card is unactivated - and i presume it is brand new and hasn't been used in another phone before - the iphone is likely to not recognize it until it is actually activated on the network.

If its not activated and still waiting for port, then it will give a sim error until Straight Talk activates the sim