Nokia cell phones Secret Codes.

21 Best Secret Codes. 

These 21 codes work on most Nokia Mobile Phones to hidden functions that you can’t change through the phone menu activate & deactivate advanced.

On the main screen type in

1. Default security code is 12345

2. *#06# for checking the IMEI (International Mobile Equipment Identity).

3. *#21# Allows you to check the number that “All Calls” are diverted to

4. *#30# Lets you see the private number

5. *#43# allows you to check the “Call Waiting” status of your phone.

6. *#61# Allows you to check the number that “On No Reply” calls are diverted to

7. *#62# Allows you to check the number that “Divert If Unreachable (no service)” calls are diverted to

8. *#67# Allows you to check the number that “On Busy Calls” are diverted to

9. *#73# Reset phone timers and game scores

10. *#7760# Manufacturers code

11. *#7780# reset to factory settings.

12. *#67705646# this will clear the LCD display (operator logo).

13. *#0000# to view software version.

14. *#9999# Phones software version if *#0000# does not work

15. *#2820# Bluetooth device address. 

16. *#9990# Says "Bluetooth Test Mode" on Symbian models; accepts without any messages and Bluetooth behaves abnormally on non-Symbian ones (models with build-in Bluetooth radio, activate first to use)

17. *#92702689# - takes you to a secret menu where you may find some of the information below

18. *#3370# - Enhanced Full Rate Codec (EFR) activation. Increase signal strength, better signal reception. It also help if u want to use GPRS and the service is not responding or too slow. Phone battery will drain faster though.

19. *#3370* - (EFR) deactivation. Phone will automatically restart. Increase battery life by 30% because phone receives less signal from network.

20. *#4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30% more Talk Time

21. *#4720# Deactivate Half Rate Code

Tips to Increase Cell Phone Battery Life

Your cell phone may state it has a specific battery life, but that's with minimal use. Apps, hardware settings and even the brightness of your screen all drain cell phone batteries faster than you may expect. With a few changes to your phone, you can increase battery life so your phone doesn't die when you need it most.

Master the Display

If you look at your cell phone's battery use settings, you'll see one of the biggest drains is the display. Go into your phone's display settings to reduce the strain on your battery. Start by changing the brightness level on the display. The dimmer the display, the less battery power used to illuminate it. Second, change your display timeout period to a shorter time. This is the length of time the display stays on when the phone is inactive.

Communications

For hands-free communication, Bluetooth is wonderful, but it also eats up your battery charge. If you're not using Bluetooth, turn the feature off. This is perfect for times when you're not wearing your headset or not planning on using your phone at all. Another hidden battery waster is Wi-Fi. Unless you're in an area where you'll be using Wi-Fi, turn the feature off. The constant scanning for Wi-Fi networks drains your battery even if you're not connected to a network. Both features can be turned back on whenever you need them.

Lose GPS

Many apps ask for your location in order to work properly, such as mapping tools and check-in apps like FourSquare. These apps use the phone's built-in GPS to monitor your location. Unless you are actually using these apps, consider turning GPS off to avoid draining the battery prematurely. Alternatively, deny access to location tracking on specific apps if you'd prefer not to turn off GPS completely.

End Notifications

News and email apps, among others, love to notify you each time there is an update. If you rarely respond to the notifications, turn them off. Open each app and change its settings to prevent or limit notifications. Notifications often turn on your display and use audible sounds. Both drain battery power.

Drop Unnecessary Activity

Live wallpaper is pretty, but it does nothing but drain battery power when you're not looking at it. The same goes for widgets. These two simple items remain active even if your display is off. Consider using basic wallpaper and a shortcut to the app on your home screen instead to save your battery.

Battery-Managing Apps

For even more control over your cell phone's battery, download a battery-managing app. These utilities automatically turn off apps when your phone is not in use and turn off features you're not using such as Wi-Fi. By changing the app's settings, you choose exactly which features the app can change on your phone at any time. Common battery managers include JuiceDefender and Battery Saver for Android and Battery Life Pro for iPhone.

How To Extend Cell Phone Battery Power Bluetooth Tricks?

Hello cell phone users, you are now going to discover the simple but very effective method on how to extend cell phone battery power using Bluetooth setting. And it will also possible in any kind of phone with Bluetooth application. The most problem will get for the cell phone users it is losing cell phone battery power as you are on the cell phone.  Almost everyone has experience for this, and at slightest once it trapped you by the whole shock!

When you own a mobile phone as influential as the iPhone, it is no question why cell phone battery power starts to drain.  It is normally happen when you are listening to your desired song, read-through your email and text messaging numerous friends on one occasion.  As a result, you will start on draining your cell phone battery life more rapidly than you thinking.

Although, on the Apple website, they obviously make clear the battery life prospect, they simply include the information if you are organizing one application all together.  On the other hand, if the iPhone users are recognized for anything, it is for their aptitude to multitask.  However, multi-tasking is a source for a fast draining of battery life of your cell phone.

Nevertheless, there are quite a lot of things that you are able to dig up to make your cell phone battery life yet longer.  But of course, the iPhone is not branded for draining its battery really quick; there is some area for a long-lasting battery performance.  If you go after these guidelines, then you will have an iPhone that end you longer than you might yet see in your mind's eye.  Conceivably the greatest tip that anybody with an iPhone be able to follow is to basically turn off your cell phone Bluetooth if you are not using it.  Just a few people recognize that after you keep your Bluetooth turned on, even you are not using on it, you are draining your cell phone battery life.

For the reason that there is a locate quantity of power that is inhibited by the Bluetooth segment of your iPhone, and the battery power is draining because the phone is continually searching for other Bluetooth devices.  If you do not wish to pair with a Bluetooth apparatus, well make sure that your cell phone Bluetooth is turned off properly. Got it? So, I hope you are learning here on how to extend cell phone battery power.