I Just Got This Iphone 5s And it's asking me for the original owner apple id and password i don't know the original owner He/She has there number there but it's missing a digit for me to call them what should i do ?

If a second-hand iOS device has been 'Activation locked' then only the previous owner can unlock it, either by providing you with the account ID and password, or by removing it from his list of devices (as he should have done before selling it) - please see http://support.apple.com/kb/ts4515

If you are unable to contact him to do this then I'm afraid you will not be able to use the device - there is no other way of unlocking it at all. Apple cannot unlock it for you, nor trace the previous owner.

You should if possible return it to wherever you bought it and ask for a refund as in this event the device is completely useless.