hey guys in just restart my iPhone 7, and suddenly I can't log in, there's info that I need to upgrade

Hi mantra291,

welcome to the Apple (user-to-user) Community.

Re: after I erase and restart my phone now its nor working anymore

There may be tips that can help you in the linked article below:

Eg: You may be able to use a computer to put your device in recovery mode and set it up again.

(You can scroll down to the info fir connecting iPhone 7)

If you can't update or restore your iPhone or iPod touch - Apple Support

If needed: iPhone Support website (info. / support / contact options etc.)

There is a "Get Support" link (online chat / phon / email etc.) at the bottom of their webpage:

iPhone - Official Apple Support

All the best :-)