Hi crusty.
go to this link and see if it helps you out.
Sim card invalid can repair this Google Search
SOURCE: My phone keeps turning off when i turn it on....
remove your memory card and turn it on again.
your welcome
SOURCE: I have a Nokia E71 and using SIM from my old
open "address book", then press "option"scroll down to "SIM contacts" and press the right-navigation key and select "SIM Directory"
It will display contacts on your SIM card. To copy contacts from SIM to phone memory. Select "Options" then scroll down to "Mark/Unmark" press right-navigation key and select "Mark All" then select "Options" again and then select "Copy to Contacts"
That will copy your contacts from SIM to Phone directory.
SOURCE: I have a straight talk
Hi,
Please contact your service provider to check and ( if required ) to replace the SIM card
Regards, Jay
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