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Twitter embroiled in iOS/Android contact upload brouhaha
The ugly: Twitter was criticized for failing to make clear what it does with your data, particularly personal and sensitive data, after a string of iOS- and Android-related data uploading controversies. Facebook and Path were both embroiled in the row, and Twitter was no exception.
The microblogging site admitted that it stores user contact details, such as phone numbers and email addresses, for up to 18 months when a user access the "Find friends" feature. Twitter quickly fixed the privacy fumble in a later version of the mobile device software.