Samsung Galaxy S4 Smart Phone: "Not registered on Network"


 I have Samsung Galaxy S4. I have been using for a year. Today, suddenly, I cannot call somebody (either to their cell phone or home phone).

The message that I get: “Not registered on Network”

However, I still can get the my Yahoo Email; I still can get the message from “WhatsApp” groups

Any help?

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Natty GregIn Theory (IT)Commented:
Do a battery pull on the device
tjieAuthor Commented:
I do a battery pull, but the problem remains

I contacted the T-mobile; Per T-Mobile, there was someone changing "the security setting" of my account. They brought it back as "default"; asked to restart my smart phone, and solved the problem.


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tjieAuthor Commented:
The problem was solved by T-Mobile my provider
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