1. A method of upgrading a wireless mobile communications network, comprising: capturing network events from the wireless mobile communications network; obtaining network simulation data from an automated network simulation planning tool; making discrete values of said network simulation data, wherein said making comprises: determining a range of values for at least one of a received signal strength and signal-to-noise ratio of a simulated signaling channel from said network simulation data; and dividing the range of values into a plurality of discrete sub-intervals; comparing, by a computing device, the captured network events to the discrete values of said network simulation data to calculate degrees of correlation between the captured network events and the discrete values of said network simulation data and derive diagnostic indicators that evidence criticalities in a current network configuration; and modifying the current network configuration to overcome the criticalities.