Compare Siemens AL21

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Photos relative in size	Siemens AL21	Siemens A31	Siemens AF51	Add phone to compare Choose brand Choose product
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Dimensions:	87 x 46 x 19 mm	102 x 46 x 18 mm	79 x 41 x 20 mm
Weight:	78 grams	85 grams	80 grams
Stand-by:	1.3 week	1.6 week	1.3 week
Talk time:	5 hour	5 hour	5 hour
Announced:	23 november 2005	23 november 2005	23 november 2005
Design type
Slider:
Monoblock:
Clamshell:
Controls
Directional key:	4-way	4-way	4-way
Voice command:
Voice dialing:
Display
Color display:	Adjustable display brightness, 65.536 colors (16 bits), TFT	Adjustable display brightness, 65.536 colors (16 bits), CSTN	Adjustable display brightness, 65.536 colors (16 bits), CSTN
Resolution:	130 x 130 pixels, 7 lines	128 x 128 pixels	130 x 130 pixels, 7 lines
External display:			65.536 colors (16-bits), CSTN
Resolution:			96 x 64 pixels
Hardware
Integrated antenna:
Telephony
Integrated handsfree speaker:
Vibrating alert:
Operating frequency
Tri band:
Quad band:
Data network
GPRS:
Personal Information Management (PIM)
Alarm clock:
Calculator:
Converter:
Date and time notation:
Phonebook with groups:
Reminder list:
Stopwatch & countdown timer:
To-do list:
Voice memo:
Available applications
Automatic switch on/off phone:
Games:
Java application support:
Messaging
Instant messaging:
MMS:
Predictive Text Input:	T9	T9	T9
SMS:	Group messaging, receive and send concatenated messages	Group messaging, receive and send concatenated messages	Group messaging, receive and send concatenated messages
Internet
Internet browser:
Audio
Polyphonic ringtones:	32-tone polyphonic ringtones	32-tone polyphonic ringtones	32-tone polyphonic ringtones
Build-in memory
Internal memory:	1.5 MB	1.5 MB	1.5 MB
Connectivity
Synchronisation:	SyncML	SyncML	SyncML
Tethering:
WAP:	2.0	2.0	2.0
Power supply
Battery:	User replaceable	User replaceable	User replaceable