The differents bettewn the GSM and the CDMA phones in my opinion,GSM it`s for the people who`s want to play the chicken game with carriers and jumping over the fence, the CDMA for the people who`s careless about the other cames,I had the GSM and the CDMA phones,I did picked the CDMA phone,even though I travel alots to overseas and I take my Sprint phone with me and working justfine if not even better,on the other hand the android platform it` open anyway if we have the pure google phone or not.