Smartphone firmware isn't perfect, and glitches are inevitable. Recent reports showed how the lock screens of a series of smartphones were bypassed in a few steps. Another smartphone lock screen flaw was found this week, this time on the Sony Xperia Z. The flaw was found by tech enthusiast Scott Reed and he even made a video showing how easy it is to gain access to the device.

Sony has not addressed the issue just yet, but is expected to within the next few days. It's likely the company will issue a patch to correct the lock screen bypass security flaw. Sony released a firmware update Friday to fix the "sudden death" issues that were reported with the Xperia Z. Users reported that the phone would go to sleep and not wake up, also called the "sleep of death."

As GSM Arena reported, vulnerabilities were found on the lock screens of iPhones running iOS 6.x and a series of Samsung devices including the Galaxy Nexus, the Galaxy S3 and the Galaxy Note 2. The security flaw allowed the bypass of the lock screen, exposing the phone to the risk of unauthorized access.

Apple addressed the iPhone lock screen bypass issue with the release of the iOS 6.1.3 bug fix. Samsung has not commented or addressed lock screen glitch, but third-party security vendors have released temporary fixes. Both Lookout Mobile Security and Bkav Mobile Security updated its products as a solution to the security flaw, at least for now. Check out the YouTube video in which Scott Reed shows how the Sony Xperia Z lock screen can be breached in a few easy steps.