Find cell phone signal with SignalMap, which is based on Google Maps.

The mobile phone model is easy to obtain, but if you go to a place where the signal is not easily covered, the seemingly ordinary mobile phone signal becomes a big problem - "hello?, hello? Are you there? hello?" -- which is quite annoying.

SignalMap uses Google Maps' API to create a cognitive network made up of service providers and users, clearly marking the signal conditions at that location on the map, accurate to the grid, and even the type of service provider is completely recorded. In addition, the recording of blind spots not only facilitates users, but also reminds service providers to improve their services as soon as possible.