Figure 1: The following illustration shows that "mobile network is not available" is this the case with you, yes, look down.
1. This situation is set up and we click on the "Application" in the image below.
2. Also click to open the "Settings" button to enter, details as shown in the picture.
3. Then find the "connection" first click on the link to find the link inside the "More network" we click on it.
4. In the open more network we click "Mobile network" again.
5. "Mobile network". Click on "Network Operator" to enter the details of which.
6. Now you can automatically search by "please choose automatically".
After the setup is complete, you will find that the whole problem of the beginning of the article is solved, and you can call me again.
Tip: If we still can't do that, then we can try to change a SIM card to try or restart the phone may be able to directly solve the problem of people you OH: