this problem is a real one .it does appear to sony ericsson models (w300, w550,k750i ,w900.yes w810i) but this is caused in 99% of time due to an old firmware and it is can be solved (in service) by updating the firmware--flashing, etc..if it does/when it does ..don't panic ..every problem has a solution :) I brought this phone in Dec 2006, In Jan 2007 within a month the handfree started giving problem, since it was under warranty, service centre agreed for a replacemnet in a month, but so far..its march end.. whenver i call them they r telling it will take a week..know when i will get it.....there service is very poor.... .check on more stores.my country at this moment it's 210 euros (aprox 250 usd ) whitout contract..99 euros with orange contract.i think it's great price to prasant ..Update Service is a reliable application designed exclusively for Sony Ericsson mobile phones and aimed at optimizing their stability by performing device software updates.For instance, you can synchronizes any content such as contact list or messages, manage music and multimedia files you download from the Net, connect to the Internet, check tasks of your calendar or upload songs, among others.In order to satisfy the needs of the majority of the users, this program is a synchronization tool which has a good compatibility since it supports both the most recent mobiles and the older Sony Ericsson's Walkman phones.As mentioned before, there’s no harm in installing the update anyway, especially if you experience device issues.
Not to mention that each time a Sony phone / tablet model is released, the Update Service immediately becomes available for that particular device.
If you have any other device, you will need to look for alternatives applications.
For instance i Tunes, Nokia PC Suite or Android PC Suite will suit your needs if you are looking for a suite to connect your mobile phone to your computer.
Sony-Ericsson W810i USB Driver and PC Suite An all-in-one package that bridges the gap between your computer and your mobile phone.
Installation instructions: * Download the file to a temporary folder on your PC.