"Lock" is a software setting and when a cellphone is locked, that means,
the phone only can use a SIM card from one settled carrier. In the
opposite, unlocked cell phones are GSM phones that can use SIM cards
from any carrier.
What are unlocked cell phones?
Unlocked
cell phones do not need to sign a new contract with new cellular service
provider when you want to change your SIM card provided by other
network provider and you can change them freely. It's no need to call
your SIM network carrier to activate your unlock phones.
If unlocked mobile phones have these advantages, why the customized phones exist?
In
some areas, the cellular service providers offers deeply discounted
phones or sometime for free, you just have to sign a cell plan with
these carriers for several years then you'll get these brand phones in a
low price. But you have to know that you can't change the network
provider during the contract period. For example, in US, there are four
main network and mobile phone providers; they are Verizon Wireless,
AT&T, T-Mobile and Sprint. According to their cell phone plans, they
often provide some new phones in a very low price. Even the popular
iPhone 4 would be provided for free.
How could these carriers make money if they provide cellphones for free?
These
network carriers have their plans. Think about it, sign a 2-year family
plan with one carrier means in the next two years, you can only use
service by this carrier and you have to follow its financing charges. As
you use mobile phones frequently, your telephone bill is enough for the
cost of this free of charge phone.
What are the benefits of an unlocked mobile phone?
If
you have an unlocked cellphone, you can change your SIM card freely and
it gives you more options to select a network carrier with applicable
price and telephone charge.
What is the difference between Unlocked and Unlocking cellphone?
Unlocked
mobile phone means that it is available in any GSM mobile networks but
unlocking cellphone is a phone that allows the user to download and
install applications from other open sources except the limited
applications imposed by the manufacture or carrier.
Should I buy a customized mobile phone or an unlocked cell phone?
Unlocked
cell phones are always in full retail price but most people prefer to
buy unlocked phones because they don't want to be restrained by the
contract and network carriers. As the unlocked phones are really
demanded, the US two largest GSM network carriers AT&T and T-Mobile
provide unlocked phones. These unlocked mobile phones are not available
in CDMA networks such as Verizon Wireless and Sprint. As for buying a
customized phone or an unlocked mobile phone, that depends the your
situation.
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