Most functions of a mobile phone, please click on the menu. But a number of settings can be only through keyboard shortcuts – so-called GSM codes – to set up, or queries. The most important shortcuts for can be found here.
mobile phones and smartphones do more and more, blessing and curse at the same time: One is pleased with great extras, but finds it hard into the depths of the menus. For some functions, a menu entry is missing even completely. Shortcuts are the fastest and sometimes only way to access certain options or activate . The hidden functions can be accessed with special code numbers on the (now mostly virtual) keypad of the mobile phone. Whether the codes work, however, is from the wireless service provider and the device manufacturer dependent, not every company makes the shortcut to.
To operate GSM Codes
The principle is simple: press the dial mode, a sequence of keys such as diamond or star in combination with numbers and thus activate the desired functions – some codes work only when you operate the handset symbol. To set about call forwarding or display your own telephone number. Also hidden service menus, which gets otherwise be seen only the customer service call so on. Note: With some GSM codes are menus can be called up, the risky functions (such as firmware upgrades) included. Use the codes shown here at your own risk!
Phone numbers and personal metrics
Often you need to enter individual sequences of numbers, such as phone numbers or personal codes.
Are the codes suitable for any mobile phone?
As varied as the mobile phone product line, which uses menus, so different is the operation of the code. What can change the web services and settings, determines the operator. The SIM card used may lead to restrictions; as certain functions are disabled for about prepaid cards. It is not uncommon that different mobile phone models from one manufacturer, depending on the Code reveal different information or do not function. This is usually because that is not always the same firmware – so the operating program of the mobile phone – is used.
About the Phone app on your Android smartphones can not only call contacts: Per code entry look in hidden menus or change a setting by abbreviation. But also applies to Android devices: Few codes work on all devices. Each manufacturer is cooking his own soup and also the network operator to determine as to which service is running and not what.
If you want to change options of iOS devices, usually goes through the settings menu. But even with Apple there are a few loopholes in the form of codes, one passes through the input of additional information or changes settings. In addition to character combinations for the Call Waiting or call forwarding functions, which sometimes do not differ from Android code, you elicit the iPhone deeper secrets – about the field test mode, which reveals the reception strength of the radio cell currently being used.Instead of the usual display with a maximum of five bars or circles, the system gives the signal strength of the exact numerical value. To understand the cryptic values Note: A value of -80 db is good, anything under -100 dB corresponds to a poor reception, -120 means virtually no reception. You can find the code in the photo gallery.