Default Sony Xperia T Recovery Mode How To?

Have a Sony XPeria T here and it's locked an an android lock screen, (Code forgotton). So I'm trying to get into recovery and wipe data and I've looking all over the place and I found this does not work.

Enter Recovery

Keep pressing volume up when you see the sony logo on boot screen.
Use the volume up and down buttons to navigate, power button to select.

How can I wipe the data without getting into the phone? It's never been rooted and if I can't get into the phone I can't root it.

PS, can we get rid of the video's on here they are so annoying