Hi!

All phones default on power up to Autobaud mode. The first connection defines the speed from that moment on upt to the next power up.

This is over ruled only if you define explicitly and store to the phone's memory the speed to use.

So, in your case may be you did a connection with the mobile at 19200 with the Hyperterminal and then without reseting the mobile, did you connected to the PIC circuit? Are you sure the mobile does autobaud at power up?

Ioannis