I think it's about prayer yielding no results. He's praying but all he gets in response is "silence." The silence "welds the shackles to his fears" because he feels alone and does not feel that there is a supreme being looking out for him. This realization scares him. I think the first verse is describing events in his life that led him to prayer. Everything's falling down around him so he turns to God for help. But in the end, he sees no results and thus he has "lost all faith." The title of "Zero Signal" is likely a reference to what he feels that he is receiving from the heavens: nothing.
I think it's about prayer yielding no results. He's praying but all he gets in response is "silence." The silence "welds the shackles to his fears" because he feels alone and does not feel that there is a supreme being looking out for him. This realization scares him. I think the first verse is describing events in his life that led him to prayer. Everything's falling down around him so he turns to God for help. But in the end, he sees no results and thus he has "lost all faith." The title of "Zero Signal" is likely a reference to what he feels that he is receiving from the heavens: nothing.