How is it possible bypass Internet restriction in Iran to get access to some simple sites like Google.
When out of country access is permitted there's an answer on Super UserSuperUser.SE where user Paul suggests OpenVPN ALSOpenvpn-ALS. So, it is on-topic there and there's an answer.
If that doesn't answer your question, you can ask a new one.
When out of country access is turned off, it's off. There aren't anyare no legal methods.
From NetBlocks.org, Nov 23, 2019:
"... Current connectivity levels have risen to 64% after earlier flatlining at 5% for several days. Mobile internet remains generally unavailable. ...".
It looks like a hole was found on the 17th, which was quickly plugged.