HTC Evo 4G LTE has a pixel density of:
312.47

A.K.A. EVO
Released: 2012

Resolution: 1280×720 4.7″ display

Wide XGA* (WXGA-H) 1280×720, 16:9 aspect ratio

Totaling 0.92mp (megapixels) and having a PPI of 312.47

Category: Phone
Tags: android, htc, beats audio, sense

HTC EVO 4G LTE

Codename	Jewel
Manufacturer	HTC Corporation
Compatible networks	Sprint
Availability by region	Shipped May 24, 2012 (For those who pre-ordered through Sprint online) June 2, for all other consumers.
Predecessor	HTC Evo 4G HTC Evo 3D
Successor	HTC One
Related	HTC One X
Dimensions	134.8 mm (5.31 in) H 68.9 mm (2.71 in) W 8.9 mm (0.35 in) D
Mass	134 g (4.7 oz)
Operating system	Android 4.0.4 (Upgradeable to Android 4.3 with Sense 5) unofficial upgrades to 6.0 Marshmallow
System on chip	Qualcomm Snapdragon S4 MSM8960
CPU	Dual-Core, 1.5 GHz Qualcomm MSM8960 (Krait)
GPU	Qualcomm Adreno 225
Memory	1 GB RAM
Storage	16 GB eMMC
Removable storage	Micro-SDHC
Battery	2000 mAh Li-ion (non-removable by user)
Data inputs	Multi-touch touchscreen display 3-axis accelerometer 3-axis gyroscope Digital compass Proximity sensor Ambient light sensor
Display	1280×720 px, 4.7 in at 312 ppi Capacitive Super-LCD 2
Rear camera	Backside illumination 8-megapixel autofocus with LED flash, rear-facing
Front camera	1.3-megapixel
Connectivity	LTE, CDMA2000, Bluetooth 4.0, Wi-Fi supporting 802.11 a/b/g/n, Wi-Fi Direct. Wi-Fi hotspot, micro-USB with MHL link, NFC

This righthand infobox courtesy of Wikipedia.