(This is reposted from another section on this site, in hopes of finding a resolution)

I've been spending many hours trying to use my Blackberry's Internet access on my N810 and haven't gotten anywhere. I've even talked to ATT, total time with them was 4.5 hours and we couldn't make it work.

o Blackberry firmware is 4.2.1.96

o Running latest OS2008 on my n810

o A screen inside the blackberry says it does support the dialup networking bluetooth profile

o The blackberry and n810 pair with no problems

o The n810 tries to connect but fails every time, except twice. first time it worked i manage to pass enough traffic to display the title of a web page. never got any traffic past that. second time, it connected successfully, but didn't pass any traffic

o I've confirmed with ATT that I do have the tethering option on my blackberry plan

o These are the different settings I've tried:

Access point name: tried both wap.cingular and isp.cingular (att told me this should be blank as the APN is set via modem init string, but they also said to try isp.cingular)

Dial-up number: *99# (the one att said) and also *99***1#

username: att said leave this blank, but i've tried WAP@CINGULARGPRS.COM and ISP@CINGULARGPRS.COM with matching access point name

password: CINGULAR1 (att said leave this blank too)

init strings: +CGDCONT=1,"IP","isp.cingular" and also wap.cingular. they also had me try "+CFUN=1;+CGDCONT=1,"IP","isp.cingular". They also had me try "proxy" in place of isp.cingular.

None of this has worked.

Has anyone gotten their n810 to use a ATT Blackberry 8700c successfully?