Create fake text conversations. Start a fake chat with your recipient and write and receive fake text messages. You don't need a SIM or mobile phone.
Get a fake virtual phone number and start sending and receiving text messages. You can also use your fake number to verify WhatsApp or any service like LINE, Facebook, Snapchat or Skype. This fake phone number is only for you. Nobody else can use it. The fake phone number you get is a virtual SIM and you can text without any phone or mobile.