Iphone 4s can't add more than 39 contacts?

For some reason I can't add more than 39 contacts on my new iphone 4s. I click the add button and I fill out the name and number then I hit done but the contact is nowhere to be found. Is there something i'm missing here?

Google The Problem.

When I had a 4s it did that too! Try taking out the SIM card & waiting a min then putting it back in ( sims on the side of the phone. Use a stud earring or toothpick to pop it out) or hold down the on/off button until the apple appears on the phone. When the apple appears let go of the button. If that doesn't work go to the apple store. You'll probably have to make an appointment on their website if you need to go there

Google The Problem.