For the tech-heads amongst us,
if you should ever want to pick up caller id with a GSM modem, you should know that the usual AT commands to initialize the feature on the receiving modem don't work. So, for Google's benefit, these are useless:
- AT+VCID=1
- AT#CID=1
The correct string to use is:
AT+CLIP=1
Thanks to smotbd in this Experts Exchange article about a completely different problem (scroll to toward the bottom).