Why won't my iphone4 accept my SIM card (previously in use) after a restore?

After a Restore I got this message

The SIM card inserted in this iPhone does not appear to be supported. The SIM card that you currently have installed in this iPhone is from a carrier that is not supported under the activation policy that is currently assigned by the activation server. This is not a hardware issue with the iPhone. Please insert another SIM card from a supported carrier or request that this iPhone be unlocked by your carrier. Please contact Apple for more information.

Answered in your other post. No need to post more than once in this forum.

It was not legitimately unlocked by the carrier it was locked to. It was hacked. Legitimately unlocked phones do not re-lock.

The unlock process involves the carrier it's locked to communicating specific information about the phone to Apple, where it goes into a database as 'unlocked'.

Yes. That is what you need to do. Keep in mind that a previously hacked phone may not be able to take a legitimate unlock any more, depending on what damage was done by the original hack.

Here is how it's done: How to unlock your iPhone for use with another carrier - Apple Support

Bro when I got this phone I was able to use internet WIFI and other all application, but sim-card was not running "No Sim" My friend Advise me to Factory reset. after this I got this message.