Avast, a cybersecurity software company, purchased 20 used Android phones from eBay in 2014. Even though previous owners had performed a factory reset to erase all their private data from memory, the company was able to recover 40,000 photos (including nudes and kids’ pictures), 1,000 Google searches, 750 SMS and email exchanges, and tons of contact details.
4 steps to erase data from your old phone
HTTPS matters more for Chrome

HTTPS usage on the web has taken off as Chrome has evolved its security indicators. HTTPS has now become a requirement for many new browser features, and Chrome is dedicated to making it as easy as possible to set up HTTPS. Let's take a look at how.
For several years, Google has moved toward a more secure web by strongly advocating that sites adopt the Secure HyperText Transfer Protocol (HTTPS) encryption.
iPhone or Android phones?
The Best New Features of Android P
Microsoft unveils new features for Outlook
Android features you need to use right away

Due to Android’s widespread popularity, it gets plenty of unwanted attention from cybercriminals. Recently, Android has suffered a string of security incidents that would make any user consider switching to a different operating system. Despite what the reports say, Android can be incredibly secure if you use the following features.
Is your Android phone really up to date?
How Facebook collects data on Android phones
Top Android P improvements you need to know

Every year, Google pushes out a major Android update filled with new features and improvements. Although this year’s update, Android P, is still not out for you to enjoy, Google did give a sneak preview of the new improvements.
Indoor positioning
If you’re having trouble finding your way around a huge complex like a mall or factory, Android P can help with a feature called WiFi Round-Trip-Time, which triangulates your device’s position in relation to the building’s WiFi access points.