How to Block Someone on Facebook Messenger App on Android?br br Step 1: Open Messenger App, and sign in to your account.br br Step 2: Open the Conversation with the person that you want to block.br br Step 3: Tap on 'i' Icon at the top right.br br Step 4: Scroll down, and then Tap on 'block'.br br Step 5: Tap on Toggle 'Block messages from 'your contact name''.br br It's done.