Why Does My Mobile Say Unregistered SIM?

Answer

Your mobile says unregistered sim because your sim card is expired. This may also happen if you are in a low signal area or if your phone does not have enough power charge. Turn it off for 60 seconds and back on to see if it connects properly.
Q&A Related to "Why Does My Mobile Say Unregistered SIM"
you have to call t mobile or what ever company you have to add your phone number to that sim card.
http://answers.yahoo.com/question/index?qid=200911...
Some callers block their phone number from appearing on a caller ID. When you receive a call from a blocked number, you do not see the area code, phone number or name of the person
http://www.ehow.com/info_12179651_say-number-unass...
It is a common problem to Nokia users.Try
http://www.chacha.com/question/why-does-my-phone-s...
There is a physical issue with your Sim card reading: Sim may have been slightly dislodged if you accidentally dropped or subjected your mobile to vibration: in most case, just remove
http://www.fixya.com/support/t3708199-phone_say_si...
Explore this Topic
The error message "SIM card registration failed" indicates that the phone is having trouble reading the electronic information encoded on the SIM card. ...
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