How does Shandong Shanxian Unicom open GPS by SMS?

If you are asking about GPS, the answer is that you don't need to turn it on, as long as the mobile phone supports GPS function (with receiver) and has a built-in navigation map.

If you are asking GPRS (mobile phone network) to surf the Internet, it is suggested to directly call Unicom for free customer service, and the staff will help you. I have never used Unicom. I don't know the customer service phone number. You should know.