According to the BGR Sources they told that :
One of our Apple sources has just informed us that it looks like Apple has finalized the code for its upcoming iOS 4.3 release. The build, we’re told, is 8F190 for those keeping track. Maybe we’ll see this release unify the Verizon iPhone OS-wise as well? We’ll probably see this in the wild next week if we had to bet.
They told about the release of iOS4.3 now and we told you this a few days ago that iOS4.3 will come on March 2nd 2011. But the new thing is that it will also support Verizon iPhone4 also and we didn’t knew about it. So we can expect a GM in few days and then wait for the release.