Is HTC One Available Market?

No, currently HTC One is Discontinued.

Q. How much RAM and ROM does it contain?

HTC One comes in 2 variants: 32GB 2GB RAM, 64GB 2GB RAM, available in the market.

The display size of HTC One is 4.7 inches.

HTC One Price in United States

Mobile Specifications

Released 2013, March143g, 9.3mm thicknessAndroid 4.1.2, up to 5, Sense UI 532GB/64GB storage, no card slot

Network Support & Connectivity
Technology	GSM / HSPA / LTE
2g Bands	GSM 850 / 900 / 1800 / 1900
3g Bands	HSDPA 850 / 900 / 1900 / 2100
4g Bands	3, 7, 20 - EMEA 2, 4, 5, 17 - AT&T 3, 7 - Asia 4, 17 - T-Mobile
Speed	HSPA, LTE Cat3 100/50 Mbps
Wlan	Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, DLNA, hotspot
Bluetooth	4.0, A2DP, aptX
Gps	Yes, with A-GPS, GLONASS
Nfc	Yes (Market dependent)
Infrared Port	Yes
Radio	Stereo FM radio, RDS
Usb	microUSB 2.0 (MHL TV-out), USB On-The-Go

Body & Build Quality
Dimensions	137.4 x 68.2 x 9.3 mm (5.41 x 2.69 x 0.37 in)
Weight	143 g (5.04 oz)
Build	Glass front (Gorilla Glass 2), aluminum back, aluminum frame
Sim	Micro-SIM

Display Features & Technology
Type	Super LCD3
Size	4.7 inches, 60.9 cm2 (~65.0% screen-to-body ratio)
Resolution	1080 x 1920 pixels, 16:9 ratio (~469 ppi density)
Protection	Corning Gorilla Glass 2

Platform
Os	Android 4.1.2 (Jelly Bean), upgradable to 5 (Lollipop), Sense UI 5
Chipset	Qualcomm APQ8064T Snapdragon 600
Cpu	Quad-core 1.7 GHz Krait 300
Gpu	Adreno 320

Memory
Card Slot	No
Internal	32GB 2GB RAM, 64GB 2GB RAM

Main Camera Capabilities
Single	4 MP, f/2.0, 28mm (wide), 1/3, 2u00b5m, AF, OIS
Features	LED flash
Video	1080p@30fps, 720p@60fps, HDR, stereo sound rec.

Sound
Loudspeaker	Yes, with stereo speakers
35mm Jack	Yes

Features
Sensors	Accelerometer, gyro, proximity, compass