The caller ID is used on the LG smartphone to display or suppress the phone number, and by default the network setting is used, so most phone numbers are displayed to the caller.

However, in the phone settings of the LG device you can choose whether the phone number should be explicitly displayed or suppressed.

Android 9 | LG UX 9.0
Step 1:  Open the  Phone -App
Step 2:  Open the  Menu
Step 3:  Tap on  Call settings
Step 4:  Tap on  Other settings
Step 5:  Tap on  Caller ID
Step 6:  Choose between  Network default ,  Hide number  and  Show number
  1. Open the Phone-App
  2. Open the Menu
  3. Tap on Call settings
  4. Tap on Other settings
  5. Tap on Caller ID
  6. Choose between Network default, Hide number and Show number

LG Instructions