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When it comes to cellular technology, the term "unlocked" has two different meanings. The first being someone entered your password to access the funcuality of your phone. You will not be able to tell if someone unlocked your phone. The second defination of unlocked refers to the ability for the cellular device to be functional with any service provider. To determine if your cellular device is unlocked depends on wether your cellular device is a CDMA or GSM device. If it is a GSM device you can tell if it is unlocked by inserting a different service provider's sim card. If the phone is still functional then it is unlocked. If your phone is a CDMA device then you will have to either call your bring it to your service provider and they will be able to access your device profile to determine if it is unlocked or not.
Here's a guide on how to do that thetravelinsider.com/roadwarriorcontent/unlockingfaq.htm
Vendors who offer cellular phones generally offer them unlocked so that you can use the service of your choice. If you buy a cell phone from an individual, you can find instructions online to unlock it.
1800Mobiles.com is one place to buy unlocked Verizon cellular phones. They have models from Motorola and Blackberry for sale.
There is a good guide on what you need to know here www.wisegeek.com/what-are-unlocked-cell-phones.htm
Overstock.com offers a wide selection of unlocked GSM cell phones. You can also find some on Amazon.com and Buy.com.
Most cell phones are manufactured to be used on one specific cellular network. An unlocked cell phone is one which is not tied to any one cellular provider. When a phone is unlocked, it means it can be used on any network. The tricky part is that only the phones with SIM cards can be unlocked. You cannot use an unlocked phone with Verizon Wireless and other non-SIM networks. Currently, T-mobile and Cingular are the two networks in the United States that accept unlocked phones. Be sure to check your network before purchasing an unlocked phone, as they are very expensive and usually not returnable.
You can check with AT&T, T-mobile, or even Boost mobile for a data package for an unlocked Samsung Galaxy 3 phone from US Cellular.
You have two options when it comes to buying an unlocked cell phone. First option is to find one on Craigslist.com, just choose your city and type in the desired phone plus the word unlocked. The other option is Ebay.com, search for desired phone pluse type jailbroken or unlocked.
Yes. The iPhone 5 works well on European cellular bandwidths.
If the T-moblie Phone is locked no if unlocked yes. try it.
Any of the major cellular companies' SIM card should fit into a blackberry. After you have bought a SIM card from a cellular company, all you should have to do is place it into the blackberry and activate it.