Xperia

Background
Xperia is the brand name of smartphones and tablets from Sony. The name Xperia is derived from the word "experience", and was first used in the Xperia X1 tagline of "I Xperia the best".

1st Logo (October 2012-January 13, 2014)
Logo: On a black background, we see the Xperia logo. Later, it cuts to a blue-purple gust of wind passing through.

Variants:
 * Starting with the Xperia Z, the wind is colorful.
 * Starting with the Xperia Z1, it is positioned upwards. Also, the wind is in different colors than those shown in the Xperia Z.

Technique: Just the wind passing through

Music/Sounds: None. Availability: The original version was only seen on Xperia T, the first variant appeared on the Xperia Z and the second variant appeared on both Xperia Z1 and the T-Mobile US-exclusive Xperia Z1s.

2nd Logo (March 24, 2014-May 1, 2015)
Logo: Same as the previous logo, but it instead cuts to a PlayStation 4-like background.

Variant: Starting with the Xperia Z3, the Xperia logo was replaced with the Powered by Android screen. Other changes are that the background is flat and the lines animate slightly faster.

Technique: Just the moving background.

Music/Sounds: Same as PlayStation 4's startup sound. On the Xperia Z2, the music plays earlier.

Availability: Only seen on the Xperia Z2 and Z3.

3rd Logo (April 20-July 27, 2015)
Logo: Same as the Xperia Z3 variant of the previous logo, but a new Powered by Android screen is used and it cuts to a backgound similar to the 4th logo of Sony Computer Entertainment.

Technique: Just the moving background.

Music/Sounds: Same as the previous logo.

Availability: Only seen on the Xperia 3+ (aka Xperia 4).

4th Logo (September 2, 2015-2016)
Logo: On a white background, we see the text "POWERED BY" and the 2014 Android logo forming in a simplistic way, as it then turns green. We fade out to see a white gradient background as a white line moves through, followed by two more lines. It loops until the phone fully boots up.

Technique: Modern 3D animation.

Music/Sounds: None.

Availability: Only seen on the Xperia 5.