Have a question about gsm phones. We all know gsm is a simz device . Or shall i say i know gsm is a simz device . I was fooled the other day when a friend said that they had a gsm phone , guess what i open the back of the device and only seen the sd card . Hmmmmm my question was to them was you said this is a gsm device they said yeah. I said this is a cdma it dont have a simz card . Now what would be the answer to this . Is it true or not . Feed back is needed . Cause they said and showed me straight talk is doing the gsm without the sim card and some devices dont even have sims slots. Hmmmmmmm