But, if you really want to send an anonymous text message, there are multiple sites you can do this on for free on the Internet. One site which allows you to not only send, but receive free text messages, is cbfsms.com which allows you to send a certain amount of text messages per day and simply requires the number it is going to, the message and a random sequence of numbers and letters to be entered to ensure you are not a robot. There are many other sites out there which have the same function and allow you to send a text message without it being linked to a mobile phone or even a name.
But, you can still make an anonymous call from your mobile though by typing 141 and then the phone number straight after. Then when you make the call it will come up as unknown or withheld number on the other person’s mobile or landline.