You might provide more information, like where are you? zip code?
both services are probably using the same tower.
I am so sorry to hear of your service difficulties inside your apartment. Many factors outside of Verizon’s control can contribute to indoor performance. Common causes of signal related change may include:
• Interference• Foliage• Construction• Population changes• Cell site changes (e.g., tower relocation, antenna alignment, power adjustment, etc.)
Does this issue happen when outside of the building? What is the cross streets and city of where this issue is happening? - AlbertoR_VZW