Many novice cell phone users who have tried to switch service providers have been frustrated when trying to switch service providers. Most mobile phones are locked by the company that issues the phones through the use of a special Subscriber Identification Module (SIM) card to encode their proprietary access code.

A locked cell phone has a code embedded in the SIM card that locks it for a specific carrier. The cell phone owner does not have access to modify these software settings on the SIM card, so the subscriber is bound to the phone service operator. Many people find it incredibly difficult to change the lock function. The biggest advantage of an unlocked cell phone is that it allows you to switch carriers on the fly simply by inserting a new SIM card.

Some people have the ability to unlock their current cell phone and generally all that is needed is a computer, your phone close at hand, and internet access. You can unlock them if you have that ability by contacting your service provider and for a small fee they will give you the access code. There are also software programs that will unlock your phone for you. You can find many online by doing a search.

These mobile phones can be used with various GSM-compatible operators around the world. Most mobile phones can be used within the US with carriers such as T-Mobile, Cingular / AT & T and other carriers and many other GSM service providers around the world. GSM, which leads the world as the fastest growing advanced digital technology available today. Using state-of-the-art GSM technology, they provide built-in voicemail, high-speed data, fax paging, and short message services. Users can call home, across town, across the continent, or around the world as long as cellular coverage is available. Many of the popular manufacturers are Nokia, Motorola, Sony Ericsson, Samsung, LG, and Alcatel.

There are many different types of unlocked cell phones that can suit the needs of any individual user. Nokia, Motorola, and Sony Ericsson have some of the most popular various unlocked cell phones. Nokia, which is one of the leading manufacturers in music, navigation, video, television, pictures, games and business mobility through mobile devices, launches new models almost every quarter.

The 8GB Nokia N95 cell phone that starts at the price of $ 689.99 from most retailers is a wonderful phone from the Nokia line. If you love to play games and music on your cell phone, then you should consider a Nokia N81 8GB cell phone. The Nokia E65 Quadband GSM cell phone is perfect for cell phone users who need mobile business capabilities. It has a variety of radiant colors for someone who wants a colorful phone. The Nokia E61i GSM smartphone has amazing email features that any user addicted to their email must have. The Nokia 7390 L’Amour cell phone is designed to fit the most classic cell user with a stylish built-in fold design. The best phones from Motorola, a pioneer in wireless communications, are designed to suit any individual need, for example the Motorola W375 Triband GSM or the Motorola V31 RaZR GSM. The Motorola A1200 quad-band smartphone and Motorola’s KRZR K1 quad-band cell phone, which retail for between $ 130 and $ 328. Sony Ericsson, which is known for its excellence in imaging and design, created the Sony Ericsson z-558i Triband with touchscreen handwriting recognition functions. The Sony Ericsson z-710i Quadband is incredible value with 3-click music download features and Bluetooth, all in the $ 200 to $ 350 price range at retailers.