Development

I think both technologies have their strengths and weaknesses. CDMA has the ability to roam easily onto analog networks, which gives the advantage of greater voice coverage nationwide, while GSM has better coverage globally.

CDMA will handle more calls at the same time while GSM has better voice quality. CDMA will work better with little or weak signal but GSM usually works better in metal buildings and in wooded areas.

I say the best carrier to have is one that has pricing and plans that suit your own personal needs. The best thing as far as coverage is to check which one works best where you work and live and will be using it the most. That service will be the one that's truly best.