Hi Donna1412,
A warm welcome and thanks for posting on our community forums. Sorry to hear you too are having issues activating your new Mobile sim card.
We appreciate you trying the sim in another handset and restarting the phone. (All to no avail).
I will certainly take a look at your account for you and find out why your unable to use your sim card.
I will pop you over a private message to take some details from you.
Please click on the purple envelope to accept the chat.
Kind regards Jodi.