Twitter also under scrutiny as it is revealed some apps take copy of contacts without fully alerting user.

This article titled “Apple faces US inquiry over iPhone address book privacy” was written by Charles Arthur, for The Guardian on Wednesday 15th February 2012 19.10 UTC

Apple has pledged to block apps from accessing user contact lists after accusations that several were copying address book details – including phone numbers and other details – without requesting permission.

Twitter has said it will also update its apps for iPhone and the Google Android operating system to make it clear that emails and phone numbers are uploaded to its servers, where they may be kept for 18 months.

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