Just a little while ago, Twitter updated its blog with a post reading, "Share a photo via text message". Sending and updating your twitter status via SMS has been already implemented by Twitter since long. SMS service is available at present in 80 countries and 9 languages and continue to evolve. From today, you can share photos on Twitter by including a photo in your text message.
All you have to do is to write the text of your tweet, attach the image and send it to Twitter. However, this feature is currently available with the following carriers : AT&T, Verizon Wireless and Cellular South in the US; Vodafone, O2 and Orange in the UK; Vodafone Italy; Rogers Communications in Canada; VIVA Bahrain; and, TIM Brazil.