We've tried to build this OS update with the mobile phones that we had was the Lumia625H curious, on the basis of the previous update Build 10660.
First time from the internet, find out how the continuation of the development of Windows mobile 10. And we get in windows central wmpoweruser , explaining that Windows mobile 10 build 10512 has been release.
Initially the Lumia install Windows insider with slow ring selecting, and mobile phones directly download the file updates Windows mobile 10 build 10166.
After WP 10 build 10166 installed, existing applications will soon be updated by itself following the new OS.
Then, reopen Windows insider to choose the ring you want.
Ring slow or Fast options, but the State does not affect. But the automatic Windows update will soon be updating the download file in preparation for the installation of Windows phones build 10512.
After the completion of the instaled WP 10 build 10512, we try to some applications such as camera and internet data. Like his build changes do not affect the State. This means that Between the Build 10166 and build 10512 that is still produces a slowCamera and internet data through the SIM CARD can not turn on
We check back to the communications system, the result is the same as the Build 10166: with your simcard installed in 625H, Your Lumia can still make a phone call but can not send message via SMS. with notification ... ' try again '.
Then what about if on reset advance (while in WP 10 build 10166), which then continue with the Update Windows build 10512? In this way, we have yet to try it out, your mobile users are still curious Lumia 625H please try updating it.