900 & 1800MHz
Two UK mobile phone networks (T-Mobile and Orange) use a standard known as GSM1800. This uses a frequency of about 1800MHz.Two UK mobile phone networks (O2 and Vodafone) use a standard known as GSM900. This uses a frequency of about 900MHz.
Large international companies like Apple and Nokia usually sell quad band mobile phones, because quad band mobile phones can be used everywhere in the world.
In the CDMA technology It is either between your Handset and the Mobile Station. The dedicated frequency are allocated for u sending your data to the mobile station (Uplink freuency) and a dedicated frequency is reserved for you to receive your data from the mobile station (Downlink frequency)
New Zealand uses GSM 2G 900/1800 3G 850, 3G 900/2100 AFAIK NZ is in the process of phasing out their aging CDMA networks as is many other carriers around the world.
Mobile phones, like radios, transmit digital electronic signals that are converted back into sound at the receiving end. For cell phones, the transmission is in the UHF (Ultra-High Frequency) band, hence very limited in range compared to CB bands and broadcast radio. The frequencies for civilian phones and data transmission are discrete blocks ranging between 700 to 2700 Mhz.
Cellular phone signals are carried by radio waves, which are like visible light waves only much slower and longer. Commonly used frequencies are between 800 and 900 megahertz, but some phones use frequencies as high as 2 gigahertz.
In mobile telecommunication wave length is another word for frequency. and the length can be anything provide that it is allowed by the government
Europe and Asia use dual-band through quad-band phones that are at the minimum able to operate in the GSM 900 and/or 1800 frequency bands. In North America (at least those that are carrier-based) are predominantly only dual-band phones, are in GSM or CDMA bands, and are SIM-locked.
Basically, the difference lie on the frequency being used or supported. For GSM dual band phones, the frequencies that is can support are 900/1800 MHz or 850/1900 MHz; for tri-band phones, the frequencies are 850/1900/2100 or 850/1700/2100 or 900/1900/2100 MHz or 900/AWS/2100; and for quad-band phones, the frequencies are 850 / 900 / 1800 / 1900
The wavelength of mobile phone signals typically falls within the range of 10 centimeters to 1 meter, depending on the specific frequency band used by the mobile network provider.
It may be that the 1800MHz band in the states is used by military or government departments. In the UK, it's used for radio-astronomy and other services.
They are sent the same way as radio and TV communication do. Through electromagnetic waves, with a high frequency band. The difference is that cell towers of transmission are necessary because the battery of a mobile has no enough power to send signals at a great distance. As a cell-phone user drives down the street, the signal is handed from tower to tower.