The phone number is only used If the o2 order hotline has further questions. The number is not very importamt. 

Thanks for your answer. You mean the telephone number is not important? I should wait for it?

Another queastion… I have been to German only for a week. So the apartment I rent did not have my name on mailbox… Could I still recieve the package?

It is so kind if I could have the answer!

Attache your name to the mailbox otherwise the postman can not deliver the letter with the sim card included. 

Remark: The delivery time of the sim card is up to 7 days. 

Thank you very much!