That 140 character limit which took you back to the age of SMS is now gone. At least for the private messages you send on the service. Twitter made promise that it will now allow messages of up to 10,000 characters in its mobile apps, desktop apps, and the web. As far as the 10,000 characters limit for third party’s apps like Tweetbot is concern Twitter will be supporting the new characters limits for them as well.
“It’s the No. 1 request we get from folks,They want to be able to say what’s on their mind and be themselves.” – Sachin Agarwal, product manager for DMs said The Verge
The change should be rolling out to Android and iOS apps, twitter.com, TweetDeck and Twitter for Mac. If you don’t see the feature immediately, the social network says it will have a more gradual rollout across the world over the next week weeks.