About SIM

About SIM

A subscriber identity module (SIM) is a removable smart card for phones. SIM cards store the required data to recognize the cell phone. Also, It contains information required for voice encryption to make listening in on calls almost impossible.

Also the client ID (and individual number) is attached to the SIM card and not to a specific mobile phone. This allows a consistent exchange of the same SIM card between various GSM phones.

SIM cards additionally serve as storage for SMS messages and the client’s contacts. Current SIM cards can save up to 250 name/number and up to 50 SMS instant messages.

The SIM card can’t store different numbers per contact or other increasingly complex data. This implies that if you copy your contacts data from the telephone memory to the SIM memory, contacts get separated into many entries as there are numbers for every individual contact and removes of the other information.

All GSM telephones and most iDEN telephones require a SIM card to work.

There are kinds of telephones (CDMA, TDMA, AMPS) that don’t use a SIM. Rather, they required information is programmed straight into the mobile phone.

Replaceable SIM cards come in four standard sizes:

Full-size (85.6mm × 53.98mm × 0.76 mm)

Mini (25mm x 15mm x 0.76mm)

Micro SIM (15mm x 12mm x 0.76mm)

eSIM (6mm x 5mm x <1mm) Non Removable

Nano-SIM (12.3mm × 8.8mm × 0.67mm)

A

A-GPS (Assisted GPS) • A2DP (Advanced Audio Distribution Profile) • AAC (Advanced Audio Coding) • Airplane Mode • Alarm Clock • AMOLED (Active-matrix organic light-emitting diode) • Analog Technology • Android Operating System • Antenna • Aperture • APN (Access Point Name) • Apple iOS •

B

Band • Bandwidth • Battery Charging • Biometrics • Bit • BlackBerry OS • Bluetooth • Bps (Bits per Second) • Brand • Broadband • Browser • Byte

C

Camera • Capacitive Touchscreen • Car Kit • Carrier • CDMA (Code-Division Multiple Access) • Cell • Chipset • CIF (Common Intermediate Format) • Connected GPS • Corning Gorilla Glass • CPU (Central Processing Unit)

D

DC-HSDPA (Dual Carrier or Dual Cell High-Speed Downlink Packet Access) • Dual-band • Dual-Mode • Dual-SIM • Dynamic Memory

E

EDGE (Enhanced Data for Global Evolution) • EDR (Enhanced Data Rate) • EGPRS • EGSM (Extended GSM)

F

Firmware • Flash Memory • Flight mode • FM Radio • Frequency • FTP (File Transfer Protocol)

G

Galileo (Global Navigation Satellite System) • GB (Gigabyte) • Gbps (Gigabits per second) • Geo-tag • GLONASS (Global Navigation Satellite System) • GPRS • GPS (Global Positioning System • GPU (Graphics Processing Unit)

H

H.263 • H.264 • H.265 • Handwriting recognition • Hot Spot • HSCSD (High-Speed Circuit Switched Data) • HSDPA (High-Speed Downlink Packet Access) • HSDPA+ (High-Speed Downlink Packet Access Plus) • HSP (Headset Profile) • HTML (Hypertext Markup Language) • Hz (Hertz)

I

iDEN (Integrated Digital Enhanced Network) • Image Signal Processor (ISP) • IMEI (International Mobile Equipment Identity)

J

Java

K

KB (Kilobyte) • Kbps (Kilobits per second) • Key Guard

L

LCD (Liquid Crystal Display) • LED (Light-Emitting Diode) • Li-Ion (Lithium Ion) • Li-Polymer (Lithium Polymer) • Loudspeaker

M

Macro • Magnetometer • mAh • MB (Megabyte) • Mbps (Megabit per second) • Megapixel • Memory card slot • Memory effect • Messaging • MHz (Megahertz) • Micro USB • microSD • microSDHC • MIDI (Musical Instrument Digital Interface) • MIDP (Mobile Information Device Profile) • MMS (Multimedia Messaging Service) • Mobile games • Mobile High-Definition Link (MHL) • Mobile IM (Instant Messaging) • Modem • Monochrome • MP3 (MPEG Layer 3) • MPEG (Motion Picture Experts Group) • MPEG-4 video • Multitouch input method • Music playback time (battery life) • Music Player

N

NAND Memory • Network capacity • Network coverage • NOR Memory • Numeric keypad

O

OEM (Original Equipment Manufacturer) • OLED (Organic Light-Emitting Diode) • Optical Zoom • OS (Operating System) • OTA (Over-The-Air) • OTG

P

PCS (Personal Communications Service) • PDA (Personal Digital Assistant) • Pixel • Pixel density (Pixels Per Inch) • Price • PTT (Push-To-Talk) • Push

Q

Quad-band • QVGA (Quarter Video Graphics Array) • QWERTY keyboard layout

R

RAM (Random-Access Memory) • RBDS (Radio Broadcast Data System) • RDS (Radio Data System) • Resistive touchscreen • Resolution • Ringtone • Roaming • ROM (Read-Only Memory) • RS-MMC (Reduced-Size Multi Media Card)

S

Screen protection • SD (Secure Digital) • Secondary camera • Sensors • SIM • SIM lock • Single-Band • Smart Watch • Smartphone • SMS (Short Messaging Service) • Speed Dial • Stand-by time (battery life) • Stereo Speakers • Streaming Video • Stylus

T

Talk time (battery life) • Tethering • Text messaging (texting) • Touchscreen • Tri-band

U

UI (User Interface) • UMTS • UPnP (Universal Plug and Play) • USB (Universal Serial Bus) • USB On-The-Go • USIM

V

VGA (Video Graphics Array) • Video call • Voice dialing • Voice mail • VPN (Virtual Private Network)

W

WAP (Wireless Application protocol) • WCDMA(Wideband Code Division Multiple Access • Wearable Technology • Wi-Fi • Windows Mobile • Windows Phone OS • WLAN • WMV (Windows Media Video)

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2G • 3G • 4G • 5G