Yes, some features available on telephones can also be used on the Text Relay Service. They include: Text call return: to find the last number who called you, dial 180011471 on your textphone. The last number to call will be shown on your display. If you’d like to return the call, dial 3. Number withhold: to withhold your number dial 141 before your 1800 code. This will work for both textphone and telephone users.