My family and I received 3 of the Sony Handsets when we migrated over from AT&T; to Cingular. Initially, we were quite pleased with the Sony phones; they were fun, cute, and had lots of unique features. However, our pleasure soon turned to pain. Approximately 3 months after receiving our phones, strange things began to happen. Below is a partial list:1) Phones power off in the middle of a conversation2) Phones take photographs even when they are not being handled!3) Phones "lock up" and the battery must be removed to restore function4) When the battery is removed to restore functionality, a "please insert SIM card" message is displayed even when the card is inserted properly.These items listed are the main annoyances; there are a plethora of others I did not take the time to mention.I contacted Cingular's warranty department and their faith in these phones is so jaded, they are replacing them with Motorola phones despite the fact that the warranty only provides for replacement of original equipment with the same equipment. Maybe that should be food for thought. . .