Most phones, including the Samsung SGH-D500, come automatically locked to certain networks. This means that you can't use another service provider with that specific phone. If, however, you know how to unlock it, you can use any service provider you want. This comes in particularly handy when travelling overseas, as you can avoid long distance and roaming charges. The process takes only a few minutes, and depending on your service provider, could be entirely free.
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Things you need
- Foreign or prepaid SIM card
Get your unique IMEI (International Mobile Equipment Identity) number by typing the following code into your phone: "*#06#." Take note of this number and set it aside momentarily.
Get a hold of your service provider and ask them for an unlock code. You'll have to give them your IMEI number, and probably your name, mobile number and e-mail address as well. If they won't give you an unlock code, you can still buy one from an online site such as unlocking.com, unlocktotalk.com or mobileunlocksolutions.com.
Power down your phone and replace its SIM card with your new prepaid or foreign SIM card.
Type "#7465625638unlock code#" into your phone (with "unlock code" being the 8-digit code you received previously). A screen will appear, notifying you that your phone has been successfully unlocked.
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