Unregistered sim card no service - T-Mobile Motorola Razor V3 Custom Cell Phone Car Charger

If your Long-cz mini flip phone is displaying a message that the SIM card is unregistered, it could be due to a few different things:

1. SIM card not activated: Make sure that the SIM card has been activated with your service provider and that you have an active service plan.
2. SIM card not compatible: Check if the SIM card is compatible with your Long-cz mini flip phone. Some service providers use different types of SIM cards.
3. SIM card not inserted correctly: Make sure that the SIM card is inserted correctly into the phone. Make sure the SIM card is inserted in the correct orientation, and that the contacts on the SIM card are facing down and aligning with the contacts in the SIM card tray.
4. SIM card slot is damaged: The SIM card slot may be damaged, preventing the SIM card from being recognized. If so, you may need to take the phone to a professional for repair.
5. Firmware issue: If the problem persists and none of the above solutions work, the firmware of the phone may be causing the issue. In this case, you may need to contact the manufacturer for further assistance or check if the device is still under warranty.

It's important to note that the steps may vary depending on the device's model, firmware version, and the region. It's best to check the manufacturer's manual or online guide for specific instructions.

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

How to Activate an Unregistered SIM Card eHow

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..

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.

Either the SIM card is damaged, inactive, or not activated. Call your cellular service provider.

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

unregistered sim card? if thats the prob. maybe som1 else is using ur phone # like a replacement sim. if not check the network frequency