Q: IOS 10 upgrade freeze on iphone SE

In that case you need to connect your iPhone to a computer to update iOS.

Update the iOS software on your iPhone, iPad, or iPod touch - Apple Support

I connected my iphone but that doesn´t help. It say´s me that my update doesnt´t works caused by connection or i should try again later....

Hopefully you can get an Apple Support tech to help you restore your phone to a better version. (like v9.3.2-v9.3.4), I was worried about the same exact thing: wait for the "Golden Versions," (if you don't mind excess battery usage), and the critics/experts are saying it'll be v10.0.1, or v10.0.2. I would be cozy with a v10.1.0+, as I wouldn't get the first version of any iOS (after the v7.0.3 issue). iOS v9.3.4 is a Golden Version with a fix that fixes the has exploits used by hackers/crackers to mod/hack your iPhone. I hope this helps.