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What's the difference between the Sony Ericsson T630 and the T637?

the difference between the two phones is that the t630 has a frequency that is made for outside the US and the t637 is the North American version of the phone.

Other wise the two phones are exactly the same specs and all.

if you have further info please reply below

Modes GSM 850 / GSM 1800 / GSM 1900
Weight 3.26 oz (92 g)
Dimensions 4.02" x 1.69" x 0.67" (102 x 43 x 17 mm)
Form Factor Bar
Internal Antenna
Battery Life Talk: 9 hours (540 minutes)
Standby: 300 hours (12.5 days)
Battery Type LiPolymer
Display Type: LCD (Color TFT/TFD)
Colors: 65,536 (16-bit)
Resolution: 128 x 160 pixels
Platform / OS (N/A)
Processor ?
Memory 2 MB (built-in, flash shared memory)
Phone Book Capacity 512
FCC ID PY7A1031012 » (Approved Mar 12, 2004)
Polyphonic Ringtones Chords: 32
Ringer Profiles Number of profiles: 8
Vibrate Yes
Bluetooth Supported Profiles: HSP, HFP, DUN, OPP, FTP, BIP, Sync
version 1.0b
Infrared (IR) Yes
PC Sync Yes
Multiple Numbers per Name Numbers per entry: 5
Picture ID Yes
Ringer ID Yes
Voice Dialing Yes
Custom Graphics Yes
Custom Ringtones built-in 4-track polyphonic ringtone composer
Data & Network
Data-Capable Yes
Packet Data Technology: GPRS
class 8
WAP / Web Browser WAP 2.0
Predictive Text Entry Technology: T9
Side Keys Yes
Email Client Protocols Supported: POP3, IMAP4
EMS / Picture Messaging Yes
Text Messaging 2-Way: Yes
plus instant messaging (IM)
Text Messaging Templates Yes
Photo & Video
Camera Resolution: CIF (352 x 288)
Alarm Yes
Calculator Yes
Calendar Yes
SyncML Yes
To-Do List Yes
Voice Memo Yes
Games supports downloadable Java and Mophun games
Java (J2ME) Version: MIDP 1.0

Here is even more info on this straight from sony

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