title: How to restore purchase within in-app purchases?
body: <p>I have implemented In-app purchase functionality in my iPhone app. In that I have given Restore Option. Sometimes, when I tapped restore button, I am not getting any product ids from App Store. But I have done purchases using Apple ids (Test User Account).</p>
  
  <p>But sometime it works with some-other Apple Ids (Test User account). Why is this behaving differently?</p>
  
  <p>How long should I wait to restore the purchase once after purchase is done. I use to check it on after 10min. Is that OK?</p>