> 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 [SuperUser.SE][3] where user [Paul][4] suggests [Openvpn-ALS][5]. 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 are no legal methods.

From [NetBlocks.org][1], 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.

[![Internet shut off, except for a hole that was quickly patched.][2]][2]

  [1]: https://netblocks.org/reports/internet-restored-in-iran-after-protest-shutdown-dAmqddA9
  [2]: https://i.sstatic.net/AQR4t.jpg
  [3]: https://superuser.com/q/429358/419485
  [4]: https://superuser.com/a/429387/419485
  [5]: http://sourceforge.net/projects/openvpn-als/