i cannot find simcard applications on my iphone6s its not on the settings.>phone

What SIM card applications are you referring to? Apple does not support storing apps or information from the iPhone onto the SIM card.

Sim Applications come from your carrier directly. Generally for carriers that support them, they can be found in Settings->Cellular->Sim Applications.

If that is not what you mean, you will need to explain exactly what you are looking for.