what do i need to know

I was thinking of buying a new cell phone off of ebay but im not sure how to tell if a phone will work with my service provider which is telus. Do i need to know the frequency and what does cdma meen?

Thanks

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CDMA
Short for Code-Division Multiple Access, a digital cellular technology that uses spread-spectrum techniques. Unlike competing systems, such as GSM (Rogers, Fido, Cingular, TMobile), that use TDMA, CDMA does not assign a specific frequency to each user. Instead, every channel uses the full available spectrum. Individual conversations are encoded with a pseudo-random digital sequence.

In order for the phone you purchase of ebay to work it MUST be a Telus phone. Although there are other CDMA providers like Bell, Verizon, and Sprint, their phones don't and will never work on Telus.