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I live in NYC but work a lot in Europe and can't use my Treo over there, OR Can I? Am such a dummy to this business of locked vs unlocked. Can someone explain? If I purchased this phone through verizon is there a way to put in a european sim card into it?
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Sure. I'll explain it. Verizon uses CDMA technology. So does Sprint. Cingular and T-Mobile use GSM technology. GSM is the predominant technology in Europe. GSM phones use SIM cards. If you bought a Cingular phone, you could only use a Cingular SIM card. The phone is "locked". Let's say you have a Cingular phone and travel to Europe for work. Although you could use your phone, the charges would be astronomical. If you purchased an "unlocked" phone OR had Cingular unlock it for you (which is possible), you could purchase a low cost SIM card in Europe -- pop it in the phone and use the phone without incurring roaming charges -- since you're essentially using the network and minutes of the GSM carrier in Europe. Get back to NY and use your Cingular SIM card.
I hope that clears it up.
-Chris