Signal Faced Outage Due to Millions of New Users and Elon Musk Was Around to Troubleshoot FOLLOW US ON: Signal, an encrypted messaging service, saw a meteoric rise in its downloads worldwide in the past few days following a "controversial" update in the privacy policy by the rival app WhatsApp. But the influx of users migrating to the Internet's "new-find" has been so high, Signal finally faced the heat on Friday. In a statement issued by the messaging app on Twitter, the company said: "Signal is experiencing technical difficulties. We are working hard to restore service as quickly as possible."