Just received the item today, set it up, and GPS light is solid magenta, which the user manual (page 17) states:

We hooked up ours and beheld the same solid magenta GPS light and rapidly-flashing SYS light mentioned by the other reviewer.

Works great as long as you switch off Advanced Calling

4G is not all that important for a cell tower extender in your home/office because most people already have high speed WiFi

Works great as long as you switch off Advanced Calling