When a message goes out under the cover of anonymity, the recipient has no clue: not your name, not your number. The text therefore has to make sense on its own, from the first character to the last. And that text is constrained: an SMS fits within 160 characters.
Why 160, and not one more
This limit is nothing arbitrary: it stems from the GSM standard. A message travels in 140 bytes, and the GSM-7 alphabet encodes each character on 7 bits — that's 160 signs. As soon as a character falls outside this table, the message switches to UCS-2 encoding and the cap drops to 70 characters.
What it changes for a hidden message
Beyond 160 characters, the message is split into concatenated segments and reassembled on the recipient's phone. Nothing serious, but each segment loses a little space, and a discreet send always gains from staying brief.
Three useful habits
- Get to the point right away. The notification preview should deliver the meaning without opening the message.
- Avoid rare characters that switch the whole message to UCS-2.
- Count before sending. Our character counter shows you the length and encoding in real time.
Need a complete walkthrough? Follow the guide to write an SMS in 160 characters. A short, precise and anonymous message is almost always more effective than a long paragraph.
