Sorry for the trouble.
What sim card do you use on the phone?
Please make sure that the sim card is not 3 or 3g network
If the SIM card can not be recognized by your phone,please use a paper or nail to wipe the SIM card and the card slot. Sometimes it is just a problem of connection.
please also check whether you have plugged the SIM card in the right way, please pay attention to the direction when you insert the sim card.
and try other sim card to check what the problem is.
Please send email to firstname.lastname@example.org again if you have any problems and we will follow the question.