1Download the APN configuration file from this link.

Link : https://seikou-tt.jp/ios_sim_vang_3

2Go to the settings screen, select “General ” then select “VPN & Device Management”。

3The profile settings screen will be output, so select “Sim Vang APN 3” and “Settings” in the upper right。

4A warning will appear, but please select “Install” regardless。

5A pop-up screen will be displayed, so select “Install” to complete the installation。

6Select “Done” at the top right of the screen。

7Restart device。

After restart device, settings and communication SIM card will be recognized correctly。