updated 04:50 pm EDT, Mon October 25, 2010
Issue not unique to Apple devices
A vulnerability in iOS 4.1 is allowing people to make calls on a nominally locked iPhone 4, users note. Passcode-protected iPhones typically block most actions unless a person picks Emergency Call and dials a genuine emergency number, such as 911. Circumventing this on the iPhone 4 can be done by entering a non-emergency number from the Emergency screen, tapping Call, then immediately hitting the lock button. The action brings up the Phone app, where people can then access a contact list or manually dial any number.
The issue is not unique to Apple hardware. Only recently, a similar flaw was discovered with the Motorola Droid 2 and Droid X. With those devices, restricted calls can be made through a combination of Voice Actions and holding down a search button. Other Android 2.2-based phones are so far unaffected.