Sony Ericsson Xperia X7 Review -

“I remember wanting this phone so badly when it was announced. I had been a pretty huge Sony Ericsson fan at the time, but couldn't afford it.” Reddit · r/SonyXperia · 4 years ago

It was rumored to feature Dolby Digital Plus surround sound and an HDMI output for media playback. Sony Ericsson Xperia X7 Review

It was built to run Windows Phone 7 , featuring the then-new "tiles" interface. Why It Matters Today “I remember wanting this phone so badly when

The Xperia X7 was intended to be Sony Ericsson’s flagship entry into the ecosystem. At a time when the brand was transitioning from Windows Mobile to Android, the X7 represented a high-performance alternative that ultimately remained a concept or a prototype. Rumored Key Specifications Why It Matters Today The Xperia X7 was

A 4.3-inch capacitive touchscreen with WVGA (480x800) resolution.

Based on the leaks that circulated, the X7 was designed to be a "beast" of its era:

A 1.2GHz Qualcomm Snapdragon processor, which would have been a significant step up from other smartphones at the time.