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T-Mobile flaw let anyone access user info with only a phone number

A San Francisco T-Mobile Store
A T-Mobile glitch left accounts exposed. Photo: Justin Sullivan / Getty

An exposed online interface for T-Mobile let anyone access user info knowing only a phone number.

The details: Researcher Ryan Stevenson notified T-Mobile of the bug in April, and the wireless carrier took down the problematic service the next day. The bug was first reported on by ZDNet.