engine - 5:50 pm on Feb 15, 2012 (gmt 0)
Twitter's Phone App Stores User Data On Its Servers For 18 Months [latimes.com]
Twitter Inc. has acknowledged that after mobile users tap the "Find friends" feature on its smartphone app, the company downloads users' entire address book, including names, email addresses and phone numbers, and keeps the data on its servers for 18 months. The company also said it plans to update its apps to clarify that user contacts are being transmitted and stored.
It does say that Twitter users "may customize your account with information such as a cellphone number for the delivery of SMS messages or your address book so that we can help you find Twitter users you know."