If you go into your settings and under the data tab there is an option to turn on a data saver. It will turn off background apps if they are not in use. I have compared my data usage by turning this option on and my data lasts approximately  one week longer 

   I recently broke my $600 S8 and needed a new phone quickly, so I picked up a Z max for $20 at metro PCS. The fingerprint option on this phone is just one of the many features that make it Awesome! You simply go to settings and follow the "fingerprint" instructions. You can set the button to do a number of things but the it's ability to read your print from any direction, read it super fast,  read it even when your finger is upside-down and covered in french fry grease is what has made me a believer! It does all this while still maintaining the ability to recognize an impostor print and immediately block it. Now, the next time you find yourself taking a selfie while leaning over a snake pit, you don't have to stress on dropping you phone into the nightmarish and hissing backdrop. Nope, you can relax, get a good grip on your phone, press the reader upside-down or sideways and Viola!  I know, it sounds too good to be true but I assure you, it is not. If you haven't tried this feature yet, I highly recommend that you check it out.
*insert complimentary photo of me smiling over a snake pit*

1) Go to google and search "Findmydevice" and go to that web site using another device.
2) The page will show you the default mobile, If you have multiple devices then select the correct device by clicking its icon and name in the upper-left corner of the page.
3) Then click the Lock option on the left side.
4) Now give a new password and confirm it. Be sure to remember the password.
5) Now enter the new password in your Android device and gain access.
6) done!

The off screen features of oppo f3 are simply awesome. The most popular ones are typing O and the camera will open and typing V for flash light. U can also play and pause the music by typing II. And u can set any gesture for anything u want from the setting. 

Buying a new smartphone can be a dizzying experience. Should you get an an Android? Do you want a massive phablet with a giant screen, or a more modest and pocketable phone? Do you care about having the latest and greatest camera features, or are you O.K. with something more modest? If you're looking for an Android phone, you may prefer the Pixel 2, which packs Google's software smarts and unrivaled camera in a 5-inch device.

A few people asked me, how do I take a screenshot with the P9 Lite.
How do I do it so quickly and without error.

At the same time, press and hold the power and volume down  buttons.
You should feel the vibration or the phone should make a noise.
Your phone will take a screenshot and place it in your gallery.
The phone owner can then view it as s/he pleases. 
This works for the P9, I'm not sure about the P20.

HOW TO USE OPTIONS BELOW BROKEN PART

1: Go to settings.
2: Go to accessibility.
3: Turn on magnification gestures.
4: Triple tap on screen anywhere it will zoom whole screen, to exit triple again.
5: To get desired option to click scroll screen by dragging two fingers.
6: select desired option under broken part by scrolling away.
7: exception keyboard and notification bar.

In order to make sure you have enough space on your phone storage to keep taking pictures at leisure, follow these steps:
1. Delete any pictures that you do not want.
2. Go to albums on your phone.
3. Scroll down to recently deleted.
4. Choose 'select' and then 'select all' and hit delete all at the bottomof the screen.
NOTE: This permanently deletes these pictures from your phone,
Do this weekly to keep the storage on your phone free and ready to store the pictures you take.