Tap Reply (tap Reply again or Reply All if replying to multiple users).
Enter your message, and then tap Send .
To Retweet a Tweet
Locate and tap the Tweet.
Tap Retweet .
Tap Retweet to send the message as is, tap Quote Tweet to embed the original Tweet as an image within your Tweet, or tap Edit to modify the Tweet or select more profiles to publish the Retweet. Edit the Tweet, and then tap Send .