Unregistered sim card

Check this site:
http://www.ehow.com/how_7196572_activate-unregistered-sim-card.html

How to Activate an Unregistered SIM Card eHow

Unregistered usually means the sim card is not
registered with the carrier. Just reinsert it
or try a different sim

Select "Activate Phone" from our website and follow the instructions to Activate your TracFone.

Why does my phone display "SIM card registration failed/Unregistered SIM" or "No Service"?
When your TracFone is turned on you may receive the message "SIM card registration failed", "Unregistered SIM", or "No Service" because your phone has not yet been Activated. Please disregard this message, it will disappear once your phone is Active.

How is my phone Activated for use?

unregistered sim usually means the sim no longer works.. i.e its disconnected by your service provider..

My name is Bhargav
motorola v3 mobile purchase in amerika
but my home in india (gujarat - surat)
my motorola problam in not support all sim
mobile on to display error in unregister sim
please my problem soll
my contact no 9016893902
Thank You sir

If the phone is branded then it probably needs to be unlocked. Is there another service provider written on the case?

hello,for the activation of your sim card,all you need to do is just to contact your service provider and it is going to be activated.
pleasse kindly rate the solution if it's helpful,

take care.

Invalid SIM and Unregistered SIM are two different problems. Invalid SIM means the phone is locked to a certain company and you are trying to use a SIM card for another company. Unregistered SIM means the SIM card you are using is not active and you need to contact your service provider to get it activated. In order to unlock the phone so you can use anyone's SIM, you must contact the provider that the phone is locked to.

you seem card does not seem to be active that is the only way you will get that prompt of unregistered sim.

So contact your mobile provider and query your card