If my Iphone has a black screen and is frozen, i plug into itunes it says "iphone must be restored", what do i do next?

Hi volodya101,

Thanks for using the Apple Support Communities!

From your question, it sounds like you are being prompted to restore your iPhone when you connect it to iTunes on your computer. If this is the case, you may be able to update your iPhone without losing any data by following the instructions in the following article.

If you see the Connect to iTunes screen on your iPhone, iPad, or iPod touch - Apple Support

If the above steps do not work for you, please use the information in the next article to restore from a previous backup.

Restore your device from an iCloud or iTunes backup - Apple Support

Best!