Some tips for phone

I declare that many of us have to replace these machines Kokia life but not everyone know how to use all the functions introduced below.

The Journal of Science and Technology will give readers some secrets related to mobile phone; Samsung; Siemens; Motorola; Ericsson and hopefully it will help a lot for you and your loved ones.

The code to go into the secret world of Nokia: 
* 3370 #

Activate EFR (Enhanced Full Rate Codec) for better voice quality and battery power than about 5% - 10%. After pressing on the code, the machine will restart to take effect this mode. If you do not like to take the battery, press the code * # 3370 #, the machine will return to normal mode.
* 4720 #

If you use this code, you will save 30% battery life, but call quality will be inferior. If you do not like it, press * 4720 # code on the machine to normal mode.
* # 0000 #

View information about the software (firmware) of the machine. Information includes 3 lines:
+ Version (version).
+ Production date.
+ The name of the software (such as NHL-6 for Nokia 6800, NHM-5 for machine ... 3310) ..

* # 92702689 #

View the warranty information for your computer. This information includes menu 5 or 6, depending on the type of machine.

+ 1 (Serial Number): Number IMEI (International Mobile Station Equipment Identity) of the machine.
+ 2 (Made): On machines shipped.
+ 3 (Purchasing Date): Date of purchase. Note: You can enter the date of purchase by selecting the Edit menu, but only entered once and can not be repaired.
+ 4 (Repaired): On computer repair last time. This information is entered by the warranty place every time when you bring into each machine to the store for warranty or repair.
+ 5 (User Data Transfer): Transfer all the information stored in the machine to a computer for storage prior to repair or reload software. The newer Nokia devices do not have this software, so it can use the Nokia PC Suite software (CD included) for backup of computer data.

+ 6 (Life Timer): Total duration of calls (incoming and outgoing) are recorded in the form of machine eh>. Information in the Life Timer information will All Calls' Duration in Call Register menu -> Call Duration, if you do not select Clear timers to remove the timer calls from the purchase. However, other information All Calls' Duration may be deleted if the passcode lock (security code, factory default is 12345), normal users can not delete the Life Timer, and this is the message some basics you can get to know the machine has been used more or less. Very useful for when you buy the machine or in the store that reliability "poor". Some older machines do not have this menu.

To exit the information screen factory warranty, must reboot.

* # 746025625 #: Check if the SIM card (Subscriber Identity Module) that supports your clock-stop feature or not. SIM clock-stop is a feature that allows mobile devices to switch to standby mode to save battery when necessary. Some Nokia devices do not support this code.

* # 7370925538 #

Some Nokia devices allow you to store personal information secretly called the wallet, that information is protected with a password called a wallet code. This function allows to delete all the information stored in the wallet and wallet code without having to know the wallet code, just need to know the password of the machine.

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