Im a trying to buy an unlocked cell phone.....?

GSM and CDMA are the technologies the cellphone providers use... T-mobile and Cingular use GSM sprint n verizon and etc use CDMA. The sim card is a device that stores your information that can be put into different phones for GSM technologies. You want an unlocked cellphone that is compatible with your wireless provider.

If you do get a phone that isn't compatible you can take it to the wireless companies store and have them making it so it will work with their network, but it can be a hassle sometimes. They can also unlock whatever phone you want them to for their company, free of charge.

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it truly is no longer proper to any community which signifies that you'll placed any sim card in it that has coverage on your section and it truly is going to artwork. So in case you purchase a pay as you bypass sim you're literally not restricted to the service service the phone became initially proper to. Or in case you're on a plan you could take the sim out of your previous telephone and placed it in the recent unlocked one. Unlocking phones generally invalidates any coverage plans except it became executed by the service service themselves.

yes, gsm=sim card.....ask the person your buying from anyway tho.... tell them your situation and see if they can hel. if your going to give them your money, they should help and help make sure it works

Yes, that's exactly what it means.