How to Report and Block a Stolen Phone Through PTA Losing or getting your phone stolen is a major problem, especially in bigger cities like Karachi and Lahore. It’s next to impossible to find your phone again so most people want to block it remotely so your precious data doesn’t get into the wrong hands. Thankfully, Pakistan Telecommunication Authority (PTA) has launched a new complaint system for reporting and blocking lost/stolen mobile phones online. The new Lost & Stolen Device System (LSDS) makes it easy to lodge a complaint online with all the necessary details so you can report the issue as soon as possible.