What does "unregistered SIM" mean?

Answer

A message reading "unregistered SIM" means that a phone is not authorized by a service provider. According to TracPhone, this error message typically disappears after the network registers the device to which the SIM card is attached.

SIM cards provide the connection between a phone and a phone provider. GSM infrastructure, with which SIM cards work, requires that phones be authorized before they can be used. Most phones register automatically after a short period of time. In some cases, it might take some time for this to occur. Some providers require users to call their service providers before their phone is registered. If the "unregistered SIM" message continues, the SIM card may be faulty.

Reference:
Explore this Topic
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 ...
That means your contact list is full of names and numbers when you SIM card says its full. I would go through and delete the people if you can't remember their ...
In my experience PUK means Pin Unlock Key. This happens when you enter your PIN number incorrectly three times. You have to call your cell service provider to ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com