...company,can i just take the sim card,and put it in a phone? will i lose any of my features,,or will they all be there,,such as text messaging,,and other features?

I think you're asking if you can take your company's SIM card and put it into a phone of your choice rather than the company's choice, and will it work? The answer is a qualified "yes", qualified by the phone being another Nextel phone. You can't put that SIM into a phone from a different carrier because Nextel uses iDEN technology, whereas Cingular and T-Mobile use GSM, and Verizon uses CDMA.