Yes they do. They are called dual mode phones.
Here's an extract from
http://www.ubergizmo.com/15/archives/2006/02/coolpad_728_packs_entire_office_into_one_device.html
>>>>>>>>>>>>>
The Coolpad 728 is the world’s first Windows CE smartphone that supports dual networks. Based on Qualcomm’s MSM6050 chipset and Samsung’s dual core S3C2410X ARM (266MHz)processor, the Coolpad 728 enables the user to access both GSM and CDMA networks simultaneously, allowing you to skip continents without the need to swap SIM cards or cellphones. Standard features include MP3 support, office productivity software, a 1.3-megapixel camera and a miniSD card slot. Check out the specs after the jump.
• OS:Windows CE 5.0 Chinese Simplified version
• Network:CDMA 800M/1900M / GSM 900M/1800M/1900M
• CPU:Samsung ARM9 S3C2410 266MHz
• Display:2.8" 240 x 320, 262144 color TFT LCD
• Weight:180g(including 1100mAh standard battery)
• Battery:1100mAh/1800mAh Rechargeable Lithium-ion Polymer Battery
• Size:116 Ã 59 Ã 21.5mm
• supports WMA/WMV/MP3/WAV/MPG/AAC/MIDI/MMF/MP4/3GP formats
• supports streaming media
• 3D stereo surround sound system
• Full screen handwriting input method
• supports PPT, PDF, WORD, EXCEL formats
• 1.3-magepixel camera
• supports video clips with voice
• stores up to 3000 units contacts
• stores up to 2000 SMS with secure password protection
• External Memory:MINI SD card slot which support up to 1GB
>>>>>>>>>>>>>>>>>>
Cool Pad 228 is another model.
For folks in India, the wait is finallyover :)
See
http://www.voicendata.com/content/vndtoday/106101810.asp
HTH :)