If you want to start navigating in the house, there may be connectivity issues. Thick house walls can severely interfere with the signal. Phone cases made of the wrong material can also cause connection problems. Remove the case and try again. Similarly, wifi jammer signals are of course subject to interference due to reflections from signals or other nearby signals. However, if you do not receive any signal, whatever you do, you should test whether the GPS location will interfere-the antenna in your smartphone is malfunctioning.
