This story was originally published and last updated .
Signal is one of the best choices for a communication app that's focused on privacy and isn't owned by Facebook, which is why it has attracted a large and dedicated user base. Earlier this year, the app got a fresh spark to the tune of a $50 million dollar investment from a co-founder of WhatsApp. But lately there's been a bit of negative chatter in response to the app introducing a system for backing up data based on PIN codes, and many users are filling online forums with complaints.
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