Yesterday the Apple company officially launched iOS 10 and macOS Sierra public beta, the two versions of the operating systems can be installed by any person who wants to test them in their own terminals, but some of you have not managed to do this and the problem is most likely related to the standard beta versions.
If you have installed iOS 10 beta or macOS Sierra beta on your iPhone, iPad, iPod Touch or Mac, then you will not be able to install the public beta version on top of it, if you did the initial installation using a developer profile, the procedure itself being impossible precisely through the way you want to do it.
Since you used a developer profile to install iOS 10 beta, it is impossible to use another developer profile to install the public beta version, and this is because you will first have to delete the original one from your terminals in order to could install the second one.
To delete the profile initially installed for iOS 10 beta you will have to go to Settings > General > Profiles, to access the profile called iOS Beta Software Profile and choose the Delete Profile option, the profile will be immediately deleted from your terminal to allow the installation of another one from Apple.
After you have done this step, you can use the procedure of install iOS 10 public beta 1 to install this version of iOS, that tutorial being equally useful for installing macOS Sierra on any kind of Mac.
