Here are 2, hopefully, useful security suggestions. 1) phone allows the user to show text fields on the lock screen. Posting something along the lines of " FOR REWARD call (an alternative phone number). Would allow a good Samaritan that finds your missing phone to track you down. 2)Using either Tasker or MacroDroid you can easily set up your phone to do the following if there are 2 or more failed attempts to login your phone. – Silently take a picture from the front facing camera. – Send email with the picture and coordinates your email address of your choice. – Any other appropriate actions like text messages, sharing the last photo through social media etc. etc. Feel free to share other security tips.