Zebra TC21 Product Reference Guide

Application Deployment
179
16.
On the host computer command prompt window type:
adbsideload<file>
where: <file> = the path and filename of the zip file.
17. Press Enter. The Factory Reset package installs and then the Recovery screen appears.
18. Press the Power button to reboot the device.
Storage
The device contains the following types of file storage:
• Random Access Memory (RAM)
• Internal storage
• External storage (microSD card)
• Enterprise folder.
NOTE: It is recommended to install a microSD card on the device due to limited internal storage space.
Random Access Memory
Executing programs use RAM to store data. Data stored in RAM is lost upon a reset. The operating system
manages how applications use RAM. It only allows applications and component processes and services to
use RAM when required. It may cache recently used processes in RAM, so they restart more quickly when
opened again, but it will erase the cache if it needs the RAM for new activities.
The screen displays the amount of used and free RAM.
• Performance - Indicates memory performance.
•Total memory - Indicates the total amount of RAM available.
• Average used (%) - Indicates the average amount of memory (as a percentage) used during the period
of time selected (default - 3 hours).
•Free - Indicates the total amount of unused RAM.
• Memory used by apps - Touch to view RAM usage by individual apps.
Viewing Memory
1. Go to Settings.
2. Touch System > Advanced > Developer options > Memory.
Internal Storage
The device has internal storage. The internal storage content can be viewed and files copied to and from
when the device is connected to a host computer. Some applications are designed to be stored on the
internal storage rather than in internal memory.
Viewing Internal Storage
1. Go to Settings.
2. Touch Storage.

Zebra TC21 Specifications

General

Display diagonal	5 \
Touch technology	Multi-touch
Touchscreen type	Capacitive
Display resolution	1280 x 720 pixels
Battery capacity	3100 mAh
Battery life (max)	10 h
Battery recharge time (off)	4 h
Flash memory	32 GB
Internal memory	3 GB
Internal memory type	-
Compatible memory cards	MicroSD (TransFlash), MicroSDHC, MicroSDXC
Maximum memory card size	128 GB
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Bluetooth version	5.0
Security algorithms	EAP-PWD, EAP-PEAP, EAP-TLS, EAP-TTLS, LEAP, MSCHAPv2, WEP, WPA, WPA-AES, WPA-TKIP, WPA2, WPA2-AES, WPA2-TKIP
Rear camera resolution (numeric)	13 MP
USB 2.0 ports quantity	1
RFID reader	No
Scanner type	1D/2D
Certification	RoHS 2011/65/EU; 2015/863 REACH SVHC 1907/2006
Product color	Black
International Protection (IP) code	IP67
Speakers	Mono
Operating system version	10
Operating system installed	Android
Number of cores	8
Processor model	660
Processor family	Snapdragon
Processor frequency	1.8 GHz
Processor manufacturer	Qualcomm
Storage temperature (T-T)	-30 - 70 °C
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	5 - 95 %
Harmonized System (HS) code	84713000

Weight and Dimensions

Depth	13.7 mm
Width	79 mm
Height	158 mm
Weight	236 g