old GSM phones for microcontroller projects?

[jumpjack]

Who can suggest me which old GSM phones are suitable for easy connection to any microcontroller through standard serial connection? An old GSM phone can cost even less han 10$ on ebay!
But nokia phones, for example, does not usually support AT commands, they use FBUS and MBUS protocol, so they're not suitable.

 

[linoko]

Hi,
You may use the Siemens S35, C35, S45 or any other using interface cable

 

[penoy_balut]

Some old Nokia phones I tried that support AT commands are 6210 and 6310.

 

[seadolphine2000]

I can add the Nokia661o and 6610i

 

[fiolin]

I have used Sony Ericsson T290 and support text and pdu mode

 

[jumpjack]

thanks to all!

Added after 7 minutes:

p.s.
does anyone of this support GPRS?