New device contract

Seeing on other people's reviews even on facebook about poor delivery service am scared because i won't be available next weekend. I have app**** for a device contract which was approved today online. Now i am waiting for delivery which they said it takes 3-5 working days. My fear is that this may take longer as i can see on other people's reviews am hoping this may notbe the case. Also with the verification make sure it works properly.