Unlocked Sony Xperia Z3+ now available in the US via Amazon
Obviously, the Xperia Z3+ that's available via Amazon comes unlocked. It's a GSM phone with support for AT&T's and T-Mobile's LTE networks, but it will not work on Verizon and Sprint.
The Z3+ is the upgraded successor to last year's Sony Xperia Z3, featuring an enhanced 5.2-inch 1080p display, a thinner water-resistant body, a 5 MP front-facing camera, and an octa-core Snapdragon 810 processor. Some users are reporting that the Z3+ is overheating in various situations, but Sony said that it would release a software update to fix the problem.
If you're not interested in the Z3+, you should know that Sony will soon release the Xperia Z4v via Verizon Wireless. Unlike the Z3+, the Xperia Z4v features a 5.2-inch Quad HD (1440 x 2560 pixels) display, and a slightly larger battery (3000 mAh).