Signal lost after selecting USA Band in menu *#*#4636#*#*: how to solve the problem

In some android phone we can access at the advanced menu *#*#4636#*#* in which we can change some baseband settings including the radio band.

In some case after selecting the USA Band in this menu the signal goes down, we lose every network connection, and we can't do nothing to restore the network.

In this case the only real solution is to re-flash the radio through fastboot, this is the command:

fastboot flash radio radio.img