Where Do I find my calls logs?
For Android:
1. Tap on the Chat menu icon 
on the top right side corner.
2. Choose a conversation from your Recent Chat conversations that have a notification
3. You will see missed call in the Chat thread.
As a Caller:
As a Called user:
For iOS:
1. Tap on the Chat menu icon on the top right side corner.
2. Choose a conversation from your Recent Chat conversations that have a notification
3. You will see missed calls in the Chat thread.
As a Caller:
As a Called user: