Sony provided little details on the release of Xperia X Performance, only saying that the handset would be available starting June. But where exactly will the smartphone be released? Well, Sony Mobile's official US website is already showcasing the Xperia X Performance, allowing interested customers to register for more info as it becomes available (see the first source link below). Thus, we assume that the device will be sold in the US at some point, though we don't know if Sony is planning to offer it via any carriers, or just unlocked (like it's doing with the Xperia Z5).
US aside, according to XperiaBlog, the Xperia X Performance may not reach important European markets like the UK and Germany. Reportedly, a Sony representative said that the smartphone would be launched "in most global markets with a key focus in Asia (Taiwan, Hong Kong and Japan)."
The Xperia X Performance is a 5-inch (1080p) Android Marshmallow handset that's powered by Qualcomm's high-end Snapdragon 820 processor, and will likely cost at least $500 off contract. The handset offers a brushed metal finish, a 23 MP rear camera with super fast hybrid auto focus (0.1 seconds, according to Sony), fingerprint scanner, 32 GB of expandable storage space, and a 2700 mAh battery. For a closer look at the phone, check out our Sony Xperia X Performance hands-on.
sources: Sony Mobile US, XperiaBlog