iOS 10 Activation Lock. Every year we have similar situation like new iOS betas erorrs, bugs and vulnerabilities. iOS 10 have lots new problems. One of the most popular is iOS 10 Activation Lock Error. If you have such problem read here how to fix it.
Users who have updated their iPhone, iPad or iPod Touch to newest iOS 10 firmware (ipsw) can comw up with one most popular and big problem called Activation Lock. If you are new iPhone owner, you can see lots guides and tutorials with such problem. They are not able to unlock their iPhone or iPad bought from third-party resellers or people who activated Find My iPhone.
Sometimes such problem have people who send their login and password via email to others devices on Android and can't connect to iPhone. It's important to understand that new such iOS 10 option has both cons and pros. The good side about it is the inability of accessing to your devices without your Apple ID, passcode or Touch ID (fingerprint). But sometimes children can update your information and you can't unlock your device.
If you want iOS 10 Download beta, you must disable Find My iPhone before you download and install iOS 10 beta 1 or others betas.