In the “DOWNLOADED CONFIGURATIONS” section, delete the pre-installed configuration (if any).
Then select the configuration “PreSIM_TCN (v.1.0)” and press “Settings”
Then enter your phone password (if any) and continue to press “Settings”
Go to MOBILE NETWORK -> APN ACCESS POINT NAME: If the device already has an access point named DOCOMO 4G, select it, otherwise you must create a new access point with the same parameters as in step 2.
Access Point -> Create New
Enter the configuration as follows:
Name: TCN
APN : mvno.net
Username: presim
Password: presim (Note: all lowercase) Authentication Type: CHAP
Save and select the newly saved configuration to activate the SIM.