This isn't in anyway a 'cool' tip or something that will change the way you view the iPhone all together, but it is a little trick that has saved me from a lot of frustration since learning about it. 
For the longest time whenever I made the mistake while I used the calculator, I would just hit the 'C' button and zero the calculator, and start over. But, if you are looking just to remove the last number of what is appearing, all you have to do is to swipe left or to swipe right in the black area surrounding the number. 
It doesn't seem like a lot, but for someone who is constantly using a calculator for the work that I do, it is definitely something that I greatly enjoyed figuring out as it has saved me a lot of time and effort since learning about it.

Have you ever been placed onto hold by an automated computer system when all you wanted to do was go and talk to a human? well on essentially every automated system there is a bypass to this! simply type 0 on ANY phone (landline, cellphone, etc.) and you will automatically be patched through to a human! Stuck talking to the automated systems is a thing of the past with this simple tip. Talking to an automated system will never result in the system mixing up call the technology department to something ridiculous like end call. I personally have used this tip to save tens of hours that would have kept on hold with an unrefined program. 

It could be work on any Galaxy... The trick is the next. If you select the call menu and press the next combination: *#0*# you can acces to a secret menu with a lot of configuration to your smartphone. In this menu you can test elements of your mobile, to check its functioning, or simply out of curiosity.  You can check the operation of the loudspeaker, the camera, the colors it reproduces. Although the most useful option is the sensor, which allows us to check if the touch screen works correctly anywhere on the mobile. Only passing the finger will draw a line, and we can see if this line is created or not.

Are you looking for a free app that helps you to save memory and battery power? If Yes, try Greenify. I have been using this app for over 2 years and it has saved me a lot. Greenify helps you to keep your device run smoothly and save more power for the day in a unique day. Even if you install lots of apps, with greenify your android device won't run slower. Greenify makes this possible by helping you identify and put the misbehaving apps into hibernation when you are not actively using them thus saving battery power and prevent your device from lagging.

How to get Greenify?

1. Go to Playstore
2. Search for Greenify and install the application.
3. Open the app and give permissions and your app will be up and running.

Jio and other operators offer 4g connection.but some times you will get low data speeds eventhough you have fair amount of network coverage.here is a tip to speed up your data speed.This trick forces your phone to select only band 40 (2300mhz) .please note that network coverage of band 40 is low but it offers higher data speeds.This only works if you have a mediatek powered smart phone.i have tested it on few lenovo phones
step1: dial *#*#3646633#*#* from your dialler
step 2: wait for some seconds.A menu will open.You need to select band Mode from Telephony tab
step 3: untick all but band 40 options.
step 4 : click ok and restart your phone.
please note that network coverage of band 40 is low so you will have to find a spot where you get maximum coverage.Then you ll get a average speed of 30mbps.To revert back the settings dial the code again and from telephony>band mode reset the settings

Do you want a dictionary???In a digital era which brings the whole world to your fingertips if you are online, here is something to save you in a connectivity crisis! Welcome to the Sinhala Dictionary Offline, a FREE English to Sinhala / Sinhala to English Dictionary with a database of more than 160,000 words for Android version 2.2 and above. If you are on a travel to Sri Lanka or living in a poor internet access area, this is a must have app and a user-friendly tool to keep your life and work going. Dependence on the internet could cost you and the Sinhala Dictionary Offline is the best solution for you!
Main Features

* The #1 FREE "Sinhala Dictionary" app for Android
* No internet connection required (works offline!) 
* Over 160,000 Sinhala / English definitions
* Spelling suggestions 
* Word Predictions
* Displays definitions in Sinhala
* English Transliteration
* Search History
* Favourite List (V5.0 +)
* Backup & restore Search History & Favorites automatically (V5.0 +)
* Sinhala to English Dictionary
* Type Sinhala words phonetically using Roman characte

* Translator 
For all who have eagerly waited for updates and new features, a new translation service has been introduced. This requires an internet connection and has been compiled based on 3rd party sources.
Learn the English meaning of ... or What could .... mean in English' are your questions, this is the ideal and easiest tool to have anytime, anywhere on your Android phone.

Facebook : http://www.facebook.com/SinhalaDictionaryForAndroid

AR Moscow city is an augmented reality (AR) app created specially for the guests of PANORAMA360, the highest observation deck in Europe, to see digital Moscow city Towers in conjunction with the real world: Federation Towers, Central Core, Evolution Tower, Imperial Tower, City of Capitals, Naberezhnaya Tower, IQ quarter, Eurasia Tower, Mercury City Tower, OKO, Northern Tower, Neva Towers.

the app contains a unique information about the construction features and the main characteristics of each showcased tower, while unusual comparisons to international sights will definitely make you smile.

Upload the AR Moscow City app and visit one of the most innovative observation decks in the world PANORAMA360 as many surprises are waiting for you there.

I enjoyed this magic app. you can download this app and enjoy it. Thank you.
URL: https://play.google.com/store/apps/details?id=com.playdisplay.armoscowcity

1. If the Android phone wants to obtain the highest authority, we need to perform the root operation of the system. After root, we can manage the pre-installed software on the mobile phone. Today, I will teach you how to perform root operation on the mobile phone.

2. The artifact we need to use today is a powerful one-click root . You can download King root on King root website, then we install it on the computer, and then we connect the phone to the computer according to the prompt.

3. After connecting, we can click on the word of the connected mobile phone inside, but the user needs to boot the usb debugging function of the mobile phone in advance , otherwise the following prompt will be seen.

4. After the correct connection, it will become such a word inside, we click on the installation app inside, then the program will install the program into the phone, we can wait patiently.

5. After the installation is complete, the program will automatically convert to root mode, we will see the prompts inside, this time only need to wait patiently. Do not need to operate during the period, do not disconnect the phone, otherwise it is likely to cause the phone to brick.

6. The rest only needs us to wait patiently. After root success, we get the highest operational authority. When we encounter the prompt root failure, don't worry, you can try to click root multiple times.