Spy signal allows users to be better informed regarding their cellular service. It allows you to view the signal strength and real+time technology. We can also tell you what band you use LTE on Sprint and T+Mobile so you can understand what speeds and features to expect.
For Project Fi clients, users will also be able to better manage their experience by easily swapping between carriers with our code dialing shortcuts.
Phone: To use the dialer, which is necessary for the support switching codes , we need permission from the phone
For More Info Google Play
Download Signal Spy 1.5.5 APK For Android