After trying various fixes, including deploying the BB DST update to the handheld, I found that the “Canberra, Sydney +10″ time zone was creating the appointments as +11. If I set the users handset to “Hobart +10″ the appointment times worked perfectly. After finally giving up and calling Telstra I was put on hold… when a recorded message said there was dedicated BB support on the Telstra website I decided to check it out.

I found that there was indeed an issue with the DST zones and it would affect all BES users from 1st March to 4th April.

Let me save all of you Telstra customers 16 hours of work searching for this update: http://www.blackberry.com/btsc/dynamickc.do?externalId=KB15058&sliceId=SAL_Public&command=show&forward=nonthreadedKC&kcId=KB15058 (and for god sake RIM, why can’t you make it easier to find technical information on your website? Oh, and open your knowledge-base to Google! Grrr)

In the end, follow the steps in the URL above (its a simple reg fix, and a SQL script) and your “Canberra, Sydney +10″ will be working fine again.

Phew.

The trick to get it working is to ensure Telstra have configured the SIM card to use the GSM codes and not the 3GSM codes (these are the codes the Telstra NextG network use)

No initialization strings are required – as long as the codes are correct the modem will register with the Telstr Mobile network.