Could you add an option to not allowe use of cell phones?  So only land line or pay phone can call.

Hi, upcoming version will have this feature

Added options to restrict certain phone types in version 0.0.10

You can delete config to generate new, or add these options to your existing config

{
  "AddCommandsToContactList": true,
  "BlockChatCommandsBoundToPhoneNumber": false,
  "EffectEnabled": true,
  "EffectFailed": "assets/prefabs/npc/scientist/sound/death.prefab",
  "EffectSuccess": "assets/prefabs/npc/scientist/sound/respondok.prefab",
  "PhoneCommands": [
    {
      "Cooldown": 0,
      "Permission": null,
      "RestrictLandlinePhones": false, //add this line
      "RestrictMobilePhones": false, //add this line
      "RestrictPublicPhones": false, //add this line
      "PhoneActions": [
        {
          "Command": "Command executed - player id: {0}, player name: {1}, position x,y,z: {2},{3},{4}, grid coord: {5}, called number: {6:####-####}",
          "Type": "reply"
        }
      ],
      "PhoneName": "Another example",
      "PhoneNumber": 87654321
    }
  ]
}​