05-04-2009 12:04 PM
My Blackberry 7290 shows the following error after I have dialed ##121# for checking my remaining value on my SIM card.
"Supplimentary service error: Unknown alphabet."
How can I solve it?
05-07-2009 12:01 PM
If this is the only time the error occurs, then I would probably check with the service provider as the SIM card is a separate piece from the BlackBerry or there is a password that has been incorrectly placed on the BlackBerry. Let us know how it works out.