But your opinions are not based on facts, but on your feelings.
The OP stated that someone was using their phone at adoration. He did not state how, just that they were using their phone. As you have been told, many people, including priests, use their phones to pray. Nothing at all wrong with it. If you don’t like it, don’t do it, but don’t tell me that I can’t.
As far as the woman who’s phone rang- I am sorry that that happened, but people make mistakes. The OP said she left the chapel flustered. I would have been too. It would never be my intention to intentionally disrupt someone’s prayer, but stuff happens.
To be honest, I find the lack of Christian charity on this thread to be appalling.

With attitudes like many shown here, it is no surprise that people are leaving the Church.