So there is no way tu use the voice function with the internal mic and Speakers?...
Yes, it maybe possible, if you are willing to solder a few "flying leads" from the WWAN mPCIe slot to the Mic & Speaker of your T61. If you could get around the BIOS whitelist
, you maybe able to install a Voice enabled Huawei EM770 (as per my signature) which supports PCM digital audio and is able to use the ThinkPad's internal Mic & Speaker's and therefore make & receive Voice calls via your mobile operator (providing your sim plan supports Voice calls).
Sorry i ask for GPRS but i ment GPS.
I believe the MC8775V
variant is GPS enabled, as it has the 2nd antenna connector. (Both MC8775 & MC8775V modules do not support antenna diversity)