I'm doing something similar, but to answer your question very quickly, the answer is no. Verizon and Sprint use a different technology - CDMA, rather than the GSM system that Cingular and Tmobile (and most of the rest of the world) work on. GSM phones can be unlocked and used on different carriers, but not on carriers that use CDMA. For CDMA you need to get the carrier involved in the switch, so they aren't unlockable per se. Anyway, you can unlock a Cingular Treo 650, but that will only let you use it with a GSM carrier like Cingular.
Now, as far as the 700P, I've been planning to get this myself. From my research, it actually seems like in this case Sprint may be the better choice over Verizon. Their internet speeds tend to be a little higher, you aren't prohibited from doing certain things with your phone, like media streaming (Verizon has very specific limits on what you can and cannot do and will cancel your service, and probably charge you the termination fee if you don't comply), and they are a lot cheaper. While Verizon's own network has more coverage than Sprint's this isn't true as far as EvDO (high speed data), but rather mainly voice, and Sprint has roaming partnerships with other carriers that make the difference negligible.
Levi Wallach
<http://twelveblackcodemonkeys.com> - Blog
<http://dvdmon.com> - DVD Reviews
<http://wallachexpressions.smugmug.com> - Photos
> -----Original Message-----
> From: [email protected] [mailto:[EMAIL PROTECTED] On
> Behalf Of Eliot Borenstein
> Sent: Friday, May 26, 2006 3:12 PM
> To: [email protected]
> Subject: [Treo] Unlocking Cingular Treo 650
>
> I'm moving over from Cingular to Verizon to get the 700p.
> Does anyone know if it's possible to unlock my Cingular Treo
> 650 for use on Verizon ?
>
> Thanks,
>
> Eliot Borenstein
>
> Eliot Borenstein
> Chair, Russian & Slavic Studies Director, Morse Academic Plan
> New York University New York University
> 19 University Place, Room 203 100 Washington Square East, 903D
> New York, NY 10003 New York, NY 10003
> (212) 998-8676 (office) (212) 998-8676 (office)
> (212) 995-4604 (fax)
>
> http://homepages.nyu.edu/~eb7/index.html
>
> [Non-text portions of this message have been removed]
>
>
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