What does it mean when cellphone has triband option? and what is unlock cellphone?
In telecommunications, the term tri-band refers to a device that supports multiple frequencies used for communication. In the case of a mobile phone, its purpose is to support roaming between different countries/regions whose infrastructure cannot support mobile services in the same frequency range.
Unlock cell phone means you can use with different country with different network provider. If you want to unlock your mobile you can visit this site Onlinegsmunlock.com here you can get the unlock code and unlock your mobile. To get the code you have to specify the following details your mobile brand name, model,which country is locked now and network provider
There are numerous GSM frequencies in use around the world. And a mobile phone’s antenna can not always pickup all of them. So when you see tri-band or quad-band you will also notice a bunch of numbers after it. These are the frequencies that are supported. Be careful though. A European or Asian tri-band is different to a US Tri-band. If you are buying the phone in the you will be fine, if you are not and yo are going to use it in the US, check the freq. as mentioned above. Also, if you are buying in the US and you will be traveling a alot, buy a quad band. Unlocked, just means that you can use a SIM card from any network provider in any country from around the world.
GSM phones work in a band of frequencies usually the 850/1800/1900 MHz band here in USA. So if your phone is triband it can support all 3 bands and hence can be used in other parts of the world which use one of those bands supported by your GSM phone. As for unlocking, providers usually “lock” their equipment to be used by a particular service provider. The process of unlocking makes it usuable with any service provider anywhere in the world.
