https://www.ifixit.com/Answers/View/256645/Phone+disconnects+after+validating+sim+card
The smartphone works fine when without the Sim card. After inserting the Sim card, issuing the Pin code, the phone accepts the pin and then shuts off. Tried...
sony xperia psim cardphonevalidatingifixit
https://www.laptopmag.com/articles/sony-smartdock-turns-your-xperia-p-into-a-media-center-pc
The new Sony SmartDock allows users to connect their Xperia P phones to any HDTV or monitor via HDMI and access their content, documents, and more using a...
xperia pmedia centersonyturns