Will writing a letter be killed by SMS message?

Well, i think the email killed the letter - i haven't written a letter in the last 10 years! It's a sad thing, especially with the whole sentimental value of letters being lost nowadays.

It has already killed the habit of writing a letter in my city. There are other remote areas and villages in my country, where people still do not have the facility to make an emergency call, and there people still rely on letters to communicate. But in my city, life is really very fast, and people have no time to communicate and say Hi to the neighbour also. Thus sms is very popular here, and writing letters is getting backdated. Here people only write letters when the use is of a formal nature.

Never. SMS meaning "Short Message Sending" is totally different from letter writing. A cellular phone is a trendy, handy, fast, and reliable source of sending any message to others, however, it will never replace the traditional way of writing a letter, especially the handwritten one. When reading a letter, it is as if the person sending it is actually talking to me. The feeling is somehow... different. Of course, in our letters, we can always copy phrases or quotations and incorporate them in our masterpieces, and same holds true with forwarded sms, but still I could feel the sincere effort that the letter sender has done. It is as if the carefully chosen and written words in the letter carry with them the whole person of the sender.

SMS can never replace letter writing. People said the same thing about email, cell phones and the internet (in general terms), yet letter writing is still the most effective way to communicate. Not only is letter writing more effective but it is more complete. And when it comes to business, letter/written communication will always be the preferred method.

No, I don't think that SMS will take over the standard English form just yet. SMS is just created out of convenience to save time and press less keystrokes to deliver the message.