If you are referring to Mobile phone service providers locking their products to their service only is a purely business decision. Of course, no one wants to share their profits. So upon locking their products to their service, then the owner of the phone would be paying for their services.
It gives you accessibility to other service providers if it is locked with one. It also gives you network freedom for choosing your provider. Unlocking your phone makes you able to enroll with any service.
A good website is http://www.phonescoop.com. It gives you the latest information on phones and things effecting the phone companies. It also contains reviews for many phones.
judicary
The cell phone have many accessories, like battery and chargers, panels, cases, softwares, skins and covers, etc.The most important accessories is battery and chargers, because it gives power to the cell phone. Then panel and cases are gives safe to the mobile phones from other source damages.Then mobile phones are run with software.
The simple answer is - you can't ! Mobile phones are either paid for on a contract - which gives the user an allowance of free calls, or they are pre-paid - in that the user credits the account in advance. There is no third option - EVERY mobile phone is either pre-paid or contract.
A democratic government in its pure form is where the people directly make the decisions, and in turn gives people more freedom. No government at all is essentially the freest.
The first amendment gives people the freedom of speech. Protest is freedom of speech.
the first amendment gives you freedom of the press
Freedom of Speech - Amendment #1
There are many websites that gives you this comparison. You should try www.phonedog.com/cell-phone-research/phonescompare.aspx or www.mobiledia.com/phones/compare/compare.php. Most companies do not offer price adjustments unless you are upgrading and you have one of their phones.
gives us the freedom of speech
It gives the right to the American people have to freedom to say what ever they want (appropriate)....In other countries people are thrown in jail or executed because of saying what they want to say!