Great question! Most likely, the trees between you and the tower have leafed out. We have had a few situations in which a clients reception was impacted by the trees around their office building.
This problem can be solved by implementing a commercial cellular repeater solution. In many cases the cellular reception is already spotty and the trees just make the reception even worse.
This is a situation that is a good fit for a site survey. We can come out and survey your situation and try to determine what solution will be the most cost effective and achieve the cellular reception you need to conduct business effectively. Contact us to learn more about how we can help you. Anyone else have a question? Let us know, ask here!