Once your sim card is barred you have no other go..
Contact your nearest sim service or dealer and tell them the problem..
They will provide you a new sim card for some small price.
Also they will check the details of the person in which the card is registered and verify it..
if you have saved your contacts in sim card try to contact the link:
http://www.unlock-zone.com
Contact them and purchase a unlock code for some small price.
An invalid sim error is most probably due to a locked phone..
Thank you for using fixya..
Please rate me on fixya to continue my future assistance..
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