| All over the world four different Radio frequency used | | | | mobile service. As a result of this, 850 MHz network |
| for GSM mobile service. GSM is the most popular | | | | has a bigger and more penetrating reach then the 900, |
| standard for mobile phone service in the world. In more | | | | 1800 and 1900 MHz network. Apart from that, the |
| then 200 countries in the world people using GSM | | | | difference between the 850 MHz and the 900 MHz |
| mobile service. However, different countries use | | | | network hardly noticeable. Lower frequency services |
| different GSM Radio frequency for their mobile | | | | are good in big building because of their more |
| networks. Worldwide four frequencies are widely used | | | | penetrating reach. A disadvantage of a low frequency |
| for GSM mobile services. They are 850MHz, 900 MHz, | | | | network is its low capacity. |
| 1800MHz and 1900MHzAlthough 850, 900 and 1800, | | | | 900 MHz networks are quite old networks. Like 850 |
| 1900 frequency are very close, normally mobile phones | | | | MHz, 900MHz also has a bigger and more penetrating |
| can't receive more then one frequency at-a-time, a | | | | reach then the 1800 and 1900 MHz network. |
| phone that works with one band, can not receive | | | | 1800 MHz is a relatively high frequency for cellular |
| signals of other bands. So if you want your mobile to | | | | phones. Because of this, 1800 MHz networks have a |
| work with multiple bands, you need to have multi band | | | | smaller and less penetrating reach compare to 900 |
| mobiles. Based on your need, you can go for dual, tri or | | | | and 850 MHz networks. By this the reach in big |
| quad band mobile set. | | | | buildings is low. An advantage of 1800 MHz networks |
| As a whole, both high and low frequency bands have | | | | is that the capacity is bigger. This band is idle for cities |
| some advantage and disadvantages. For high | | | | where density of mobile users high. |
| frequency service, the network is less effected by the | | | | 1900 MHz available only in North America, some |
| influences of the weather. And you can have more | | | | networks in Canada and South Africa. This band is not |
| clear and un-interrupted connection. Another | | | | available in Europe or Asia. 1900 MHz quite similar to |
| advantage of a high frequency is that you only need | | | | 1800MHz. Because of high frequency 1900 MHz band |
| small antenna. Main disadvantage of higher frequency | | | | network isn't interrupted by the influences of the |
| band is its lower reach. These bands are good for | | | | weather and you can have a crystal clear connection |
| cities where density of mobile users is more. Where | | | | most of the times. For this network, GSM provider |
| as, lower frequency bands are good for rural areas | | | | needs to use more mini antennas. An advantage of |
| because of their large area reach. | | | | 1900 MHz networks is that the capacity is bigger. |
| 850 MHz is the lowest frequency used for GSM | | | | |