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AT&T Z331 vs AT&T Z221

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AT&T Z331

Also known as ZTE Z331 User Rating - 8

Posted: 14 Oct 2011
Market Status: Released US carrier availability: AT&T - Discontinued

AT&T Z221

User Rating - 8.5

Posted: 28 Sep 2011
Market Status: Released US carrier availability: AT&T - Discontinued

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Design
Device type	Feature phone	Basic phone
Form factor	Clamshell	Clamshell
Dimensions	3.86 x 2.03 x 0.67 inches (98 x 52 x 17 mm)	3.76 x 1.92 x 0.73 inches (96 x 49 x 19 mm)
Weight	3.17 oz (90 g) the average is 4.4 oz (126 g)	3.24 oz (92 g) the average is 4.4 oz (126 g)
Design features	Numeric keypad, Soft keys, D-Pad (2)	Numeric keypad, D-Pad

Display
Physical size	2.4 inches	2.0 inches
Resolution	240 x 320 pixels	240 x 320 pixels
Pixel density Pixel density - The pixel density of a display represents the number of pixels over an area of one inch. It’s measured in “pixels per inch”, or ppi. The higher the number, the more detailed and good-looking the display is.	167 ppi	200 ppi
Technology Technology - There are two main screen technologies currently used in phones and tablets: LCD and AMOLED. The former usually features a light source and liquid crystals, while the latter is based on organic light-emitting diodes. Newer LCD variations like IPS-LCD and Super-LCD allow for very accurate color reproduction and very wide viewing angles, where no significant image quality loss is observed. Current AMOLED screens differ in such a way that they can exhibit much more saturated colors (sometimes too much) and incredibly high contrast levels, which is due to black color being completely black in AMOLED displays.	TFT	TFT
Colors	262 144	65 536
Additional display Additional display - Shows specs of the phone's additional display	Color, OLED
Resolution Resolution - Refers to the width and the length od the additional display	128 x 128 pixels
Physical Size	1.46 inches

Battery
Talk time	3.00 hours the average is 11 h (649 min)	3.00 hours the average is 11 h (649 min)
Stand-by time	8.3 days (200 hours) the average is 18 days (442 h)	8.3 days (200 hours) the average is 18 days (442 h)
Capacity	950 mAh	900 mAh
Type	Li - Ion	Li - Ion

Hardware
System memory System memory - System memory, or RAM memory is the type of memory that the device uses to temporarily store data from the OS or currently-running apps. The more RAM available to the device, the better the performance will be when multiple or heavier programs are running.		64 MB RAM / 128 MB ROM
Built-in storage	0.14 GB
Storage expansion	microSD, microSDHC up to 8 GB

Camera
Camera	3 megapixels	0.3 megapixels VGA
Camcorder	Other, 176 x 144 pixels	Yes

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Multimedia
Music player
Supported formats	MP3, AAC+	MP3, AAC
Video playback
Supported formats	MPEG4, H.263, H.264	MPEG4, H.263, H.264
Radio	FM

Internet browsing
Browser	Opera Mini
supports	XHTML, WAP, CSS

Technology
GSM	850, 900, 1800, 1900 MHz	850, 900, 1800, 1900 MHz
UMTS	850, 1900, 2100 MHz	850, 1900 MHz
Data	HSDPA 3.6 Mbit/s, UMTS, EDGE	HSDPA 3.6 Mbit/s, UMTS, EDGE
Global Roaming	Yes	Yes

Phone features
Phonebook		500 entries
Organizer	Calendar, Alarm, Calculator	Calendar, Alarm
Messaging	SMS, MMS, Predictive text input	SMS, MMS, Predictive text input
E-mail	IMAP, POP3, SMTP	Yes
Instant Messaging	Yes	Yes
JAVA JAVA - J2ME (Java 2 Platform, Micro Edition) is a technology that allows programmers to use the Java programming language and related tools to develop programs for mobile wireless information devices such as cellular phones and personal digital assistants (PDAs). J2ME consists of programming specifications and a special virtual machine, the K Virtual Machine, that allows a J2ME-encoded program to run in the mobile device.	Midp 2.0, CLDC 1.1
Games		Yes

Connectivity
Bluetooth	2.0	2.0
USB	USB 1.1	Yes
Connector		microUSB

Other features
Notifications	Vibration, Silent mode, Speakerphone	Polyphonic ringtones, Vibration, Silent mode, Speakerphone
Hearing aid compatibility	M3, T4	M3, T3
Other	TTY/TDD	Voice recording, TTY/TDD

Samsung Galaxy Ring
- Posted: 19 Jun 2013
- OS: Android 4.1
- Hardware: Quad core, 1400 MHz, 1024 MB RAM
- Camera 5 megapixels, 1280x720 (720p HD) video
- Technology: CDMA (800 1900)
- Data: EV-DO
HTC Desire 200
- Announced: 5 hours ago
- OS: Android 4.0
- Hardware: Single core, 1000 MHz, 512 MB RAM
- Display: 3.5 inches, 320 x 480 pixels, Capacitive Touchscreen
- Camera 5 megapixels, 640x480 (VGA) video
- Battery: 10.9 hours of Talk Time, 693 hours of Stand-by
- Technology: GSM (850 900 1800 1900)
- Data: HSDPA 7.2 Mbit/s UMTS EDGE GPRS
Huawei Ascend P6
- Posted: 17 Jun 2013
- OS: Android 4.2.2
- Hardware: Quad core, 1500 MHz, 2048 MB RAM
- Display: 4.7 inches, 720 x 1280 pixels, Capacitive Touchscreen
- Camera 8 megapixels, 1920x1080 (1080p HD) video
- Technology: GSM (850 900 1800 1900)
- Data: UMTS EDGE GPRS
Samsung Galaxy S4 Zoom
- Announced: 12 Jun 2013
- OS: Android 4.2
- Hardware: Dual core, 1500 MHz, ARM Cortex-A9, 1536 MB RAM
- Display: 4.3 inches, 540 x 960 pixels, Capacitive Touchscreen
- Camera 16 megapixels, 1920x1080 (1080p HD) 1280x720 (720p HD) video
- Technology: GSM (850 900 1800 1900)
- Data: LTE Cat3 Downlink 100 Mbit/s LTE Cat3/4 Uplink 50 Mbit/s HSDPA+ (4G) 21.1 Mbit/s UMTS EDGE GPRS
Samsung GALAXY Ace 3
- Announced: 10 Jun 2013
- OS: Android 4.2.2
- Hardware: Dual core, 1200 MHz, 1024 MB RAM
- Display: 4.0 inches, 480 x 800 pixels, Capacitive Touchscreen
- Camera 5 megapixels, 1280x720 (720p HD) video
- Data: LTE Cat4 Downlink 150 Mbit/s LTE Cat3/4 Uplink 50 Mbit/s HSDPA+ (4G) 42.2 Mbit/s
ZTE Vital
- Announced: 10 Jun 2013
- OS: Android 4.1.2
- Hardware: Dual core, 1500 MHz, Krait, 1024 MB RAM
- Display: 5.0 inches, 720 x 1280 pixels
- Camera 13 megapixels
- Technology: CDMA (800 1900)
- Data: LTE
Nokia EOS
- Posted: 05 Jun 2013
- OS: Windows Phone 8
- Display: 4.5 inches, 768 x 1280 pixels, Capacitive Touchscreen
- Camera 41 megapixels
LG Optimus L4 II
- Posted: 05 Jun 2013
- OS: Android 4.1
- Hardware: Single core, 1000 MHz, ARM Cortex-A9, 512 MB RAM
- Display: 3.8 inches, 320 x 480 pixels, Capacitive Touchscreen
- Camera 3 megapixels
- Technology: GSM (850 900 1800 1900)
- Data: HSDPA 7.2 Mbit/s HSUPA 5.76 Mbit/s EDGE GPRS