flashing firmware for SonyEricsson Z710i

Turns out that the firmware for the Z710i can be flashed. This for example could alleviate the problem that Fido locks out the ability to use MP3s as ringtones. Even better, it seems the Z710i can be flashed with firmware for W710i, which is basically the same phone, but has nicer flash-based menu system and more advanced "walkman" music player (e.g., ability to fast-forward within a song). Here are some relevant links:

• http://www.wotanserver.com/en/supported-phones/sonyericsson-z710-debranding/
• http://www.topsony.com/forum/showthread.php?t=3519
• http://forums.wirelessadvisor.com/sony-ericsson/500-latest-firmware-for-sony-ericsson-phones.html

The interesting tidbit from the last posting is that the Service menu on the handset can be accessed using the following key combination: Right * Left Left * Left *