OnePlus X specs

Display Benchmarks
Size	5.0-inch
Resolution	1920 x 1080 px, 441 PPI
Technology	AMOLED
Screen-to-body	71.28 %
Features	Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware
System chip	Qualcomm Snapdragon 801
Processor	Quad-core, 2300 MHz, Krait 400
GPU	Adreno 330
RAM	3GB (LPDDR3)
Internal storage	16GB
Storage expansion	microSDXC up to 128 GB
OS	Android (6.0 Marshmallow, 5.1 Lollipop), OnePlus OxygenOS UI
Device type	Smartphone

Battery
Capacity	2525 mAh
Type	Li - Polymer, Not user replaceable

Camera
Rear	Single camera
Main camera	13 MP (CMOS image sensor, PDAF) Specifications: Aperture size: F2.2
Flash	LED
Video recording	1920x1080 (Full HD), 1280x720 (HD) (120 fps) Features: Time-lapse video, Video calling, Video sharing
Front	8 MP

Design
Dimensions	5.51 x 2.72 x 0.27 inches (140 x 69 x 6.9 mm)
Weight	4.87 oz(138.0 g)
Materials	Back: Glass Frame: Metal
Features	Notification light
Keys	Right: Volume control, Lock/Unlock key
Colors	Black
This device has different variants: View all

Cellular
4G (FDD)	Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
4G (TDD)	Bands 38(2600), 40(2300)
3G	Bands 5(850), 8(900), 2(1900), 1(2100)
Data Speed	LTE, HSPA, HSUPA
Dual SIM	Yes
SIM type	Nano SIM
This device has different variants: View all

Multimedia
Headphones	3.5mm jack
Speakers	Earpiece, Loudspeaker
Features	Album art cover, Background playback
Radio	FM
Additional microphone(s)	Noise cancellation

Connectivity & Features
Bluetooth	4.0
Wi-Fi	802.11 b,g,n
USB	microUSB, USB 2.0, Features: Mass storage device, Charging
Location	GPS, A-GPS, Glonass, BeiDou
Sensors	Accelerometer, Gyroscope, Hall (for flip covers)
Other	Tethering, Computer sync, OTA sync

Regulatory Approval
Measured SAR	Head: 1.11 W/kg Body: 1.11 W/kg

Buyers information
MSRP	$ 249 / € 269
This device has different variants: View all

Phone Features
Notifications	Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone
Other features	Voice dialing, Voice commands, Voice recording

Availability
Officially announced	Oct 29, 2015

Differences from the main variant:
4G (FDD)	Bands 5(850), 8(900), 4(AWS-1), 2(1900), 1(2100), 7(2600)
3G	Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

Differences from the main variant:
Weight	5.64 oz(160.0 g)
MSRP	€ 369

Moved from an Xperia Z2 to this phone. Both use the Snapdragon 801 and yet the oneplus X is much faster and smoother. It's literally stock android with some settings for a dark themes and what not. That feel in the hand. It's such a cool phone. It's so well made. The battery life is excellent but I'm a bit spoiled by the Z2; undoubtly sony does batteries better than anyone else. The camera has given me good results; The rule is simple with the camera: Get more light. My Iphone 5s had a better camera no doubt. The display is just....perfect. I literally own a tablet and I choose to watch youtube videos on my phone simply because of how amazing this screen is. People often say it's an amazing phone for the price. I'm here to tell you it's an amazing phone. And the low price simply means more people can afford this beautiful piece of technology. I genuinely believe the display and build alone are worth the price.
Edit: I don't live in the US so I can't comment on the LTE band issue with AT&T and TMobile.