Telit GM862-GPS Power supply and UART

Working with the GM862 GPS turned out to be a little tricky. It can be somewhat picky about a stable voltage during and works at CMOS logic levels.

Telit GM862 GPS United States Pre-paid Carrier Compatibility

Hopefully this will be of use to someone looking into GM862 US Prepaid carrier compatibility. I had some issues with AT&T, and T-Mobile turned out to be my carrier of choice.