Comparison of Siemens A31 and Siemens A40 smartphones based on their characteristics

Siemens A31

Siemens A40

Manufacturer and Model

Manufacturer

Siemens

Siemens

Phone model

A31

A40

Year of release

2005

2001

Appearance

Case type

Monoblock

Monoblock

Body length

102 mm

118 mm

Body width

46 mm

46 mm

Body thickness

17.6 mm

27 mm

Weight

85 g

122 g

Volume

82.58 cm³

146.56 cm³

Body materials and finishes

• Plastic

• Plastic

Colors

• Silver

• Black

Internal storage

Built-in memory

• 1024 kB

Battery

Battery capacity

820

600

Battery type

Li-Ion

NiMH

Battery charging time

2 h

2 h

Call duration in GSM networks

5 h

4 h

Standby time in GSM networks

270 h

150 h

Screen

Screen resolution

128 x 128 pixels

Screen technology

CSTN

Color depth

16 bit

Aspect ratio

1

SIM card and calls

Number of SIM-cards

1

1

Polyphonic ringtones

Vibration mode

Speakerphone

Speed dial

Autodial

Sound indication of talk time

Data exchange between SIM card and internal memory

Mobile communications

Cellular generation

2G

2G

GSM support

GSM frequencies

• GSM 900 MHz
• GSM 1800 MHz

• GSM 900 MHz
• GSM 1800 MHz

Internet data transmission standards

Data transmission standards

• GPRS

Audio

Number of polyphony voices

32

Control elements

Standard keypad

Russified input

Documents and office

Installed Organizer (PIM)

Connectivity and synchronization

PC connection

Software features

JAVA support

Installed browser

• WAP

Installed games

Receiving and sending SMS

SMS messages

SMS T9 support

EMS support

MMS support

SAR level

SAR level

0.64 W/kg

0.71 W/kg