Getting a iPhone 4s need the best carrier?

Ganna get a iPhone 4s need the best sevice company people told me sprint Verizon and AT&T Are the top 3 and I wanna know witch is the best and is it better to buy the iPhone 4s at apple best buy or the best sevice carrier

Verizon

All this company s they charge over 80$ monthly so i had sprint for 2 years i'm not gonna lie they are fk good but costmer service sucks so bad please tax they are pian in the ***. Atnt they are sucks don't go with thim atless if you wanna try thim for like a month. Verizon just like sprint…
My answer go with sprint. You will be happy

Tmrw i'm going to try boost mobile eveything and date 55$ no fee. Any boost network from sprint. I will give try