Cell Phone & Cell Phone Providers : How To Compare Wireless Phone Networks
The wireless phone networks include GSM, which is primarily Cingular and T-Mobile; CDMA, which is Sprint, Verizon, Metro PCS and many more; and iDEN, which is what Nextel and Southern Link use. Com…
this guy knows what hes talking about.
cdma also has sim cards and so does iden was based of the tdma .