First, make sure that 3D Touch is enabled on your iPhone. Pull up your iPhone keyboard and then 3D Touch anywhere on the keyboard. Do not remove your finger from the keyboard. This should turn your keyboard into a trackpad/mouse and you can move your finger to where you want your cursor to move. This makes it easy to edit/add to long texts that you have written.

There are numerous apps on playstore to take screenshot like lightshot etc. But if your using OPPO smartphone..Just rub three fingers simultaneously on screen to take a quick screenshot. 

If you ever feel like the headphone volume in your Android mobile is low, you can increase the volume as like more by using this idea,
Go to dial pad and type     *#*#3646633#*#*
Then we get the engineer mode and go to the hardware option go to audio testing click on the headset mode change the value to 160 that is a maximum value set the value and you're good to go           

When you are busy online or gaming online and keep receiving online apps messages or calls like from whatsapp it'll be very annoying and disturbing...
To prevent this you have to switch off the internet connection (to the specific app)
Here's how
Go to settings,
>Apps
>select the app Example: whatsapp
>data usage
In that you'll see Mobile data and wifi at the bottom
You just have to turn them off.
Now the specific app  won't have internet connection. So it'll stop working

 in today's era when everything is fast in the world and everything is handheld on their phone the life cannot be stopped. in this fast moving era one cannot even think to stay without their phone. now sometimes the mobile phone goes into silent mode therefore to prevent this you should keep it in vibration mode. the samsung galaxy s6 provides very good vibrations for you. this factor can be maintained by going into the settings. If you go into settings > sound and notifications and then tap vibrations. you will find many options here and how to handle your vibrations settings. You can decide by this settings that whether to turn on the vibrations or not. You can also manage your vibration intensity and its settings. By this you can manage to have strong vibrations.

Rather than using the typical 4-digit or 6-digit passcode, you can make sure your IPhone is even more secure by using an alphanumeric passcode. An alphanumeric code allows the usage of both letters and numbers in the formation of a custom passcode. Thus, the use of an alphanumeric code allows for a nearly unlimited number of possible combinations.
This minor setting adjustment is simple to accomplish. First open the 'Settings' app on your IOS device. From there, tap the 'Touch ID and Passcode' option, followed by 'Change Passcode'.  Once given the opportunity to submit a new passcode, tap 'Passcode Options' located above the keypad. In doing so, you will be offered further options for your passcode customization. From these options, select the 'Custom Alphanumeric Code' option, and enter your own custom code. 

Generally we have pc and laptops and for those who doesn't have  wire connection or wifi or router ,
and have smartphone with moblie data in it with you and a datacable wire  to connect your phone with pc or laptop.
>after connecting smarphone go to settings in smartphone ,
>open connections settings (in some phones)(or in more options).
> go to Tethering&portable hotspot.
>switch on USB tethering options in it .
> switch on mobile data.
now you can surf internet in your pc or laptop.

This is one of the most common problem for all Sony smartphones. The phone speakers works fine without any problem (Ringtones and message sounds) But the internal speaker will stop working (While playing Video and Mp3 files). We can solve this by 3 simple steps. 

By restarting Smartphone : 
For some phones restarting would solve the problem. if it doesn't work try next step.

Disabling Sound Enhancers : 
Go to    settings > sound > uncheck the options Clear Phase and  xLOUD.

If this step doesn't work try the third one.


Installing SoundAbout app :
Install SoundAbout app from google-play. go to media audio > select speaker. (by default it would be "let the app decide") 

After 2 or 3 days change the option from speaker to "let the app decide"  This app will solve the problem eventually. Check this by disabling SoundAbout service after 1 month. if your phone is okay, then uninstall the app.