The Unofficial Cingular Weblog

We did not cover the vanishing of the z520a when it originally occured earlier this month. Various user forums on the internet pointed to a possible memory leak problem within the Cingular version firmware which would cause the z520a to randomly "loose" items such as ringtones, graphics etc, causing a plethora of problems including the phone not ringing. We confirmed that not cycling the power as part of normal usage after a period would cause these symptoms to appear.

The z520a is back and should be available for sale in all outlets. If you purchased one within your return period, and are experiencing problems. we recommend getting it exchanged.

In any case, its a very good recommendation to turn your phone off and on every couple of days. Mobile phones today are much more like your home computer than the cellular phones that were on the market 10 years ago. Like your computer at home, they need to be refreshed/rebooted every now and then. Additionally like installing new software on your home computer... if your phone recieves network updates, they won't take effect until your phone is restarted.