That's the part with the lowest frequencies/longest wavelengths of any in the
electromagnetic spectrum, which we broadly call "radio waves".
You can think of it as all frequencies from maybe 30 KHz to 300 GHz, corresponding to
wavelengths from 1 millimeter to 10 kilometers.
These are not exact, hard and fast, official numbers.
1800 MhZ
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.
Mobile phones in China are available from China Mobile. They have a whole range of mobile phones as you would expect. The latest models are available at good prices
There are many mobile phones with good reviews, depending on budget. Popular phones include the Blackberry range, new iPhone 5 and Nokia mobile phones.
There are many cheap clearance mobile phones. Typically, cheap clearance mobile phones can range as low as fifty dollars in the United States of America.
900 & 1800MHz
Toshiba offer both mobile and landline phones. Their current mobile phone range includes the TG01. Their current landline range includes the DP5022F-SD. Their range is frequently updated.
They range from 15$ to over 300$ depending on what your wanting.
No - because the cellular network has a limited range.
Most of the cell phone producers offer mobile phones in red color. Among them T. Mobile appears to provide a wide range of models that are found in red color.
900 & 1800 for voice/sms (2g) 2100 for UMTS (3g)
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.