p5

i think that a iPhone 4s is a perfect phone to make the delivery service more efficient. I chose this phone because a iPhone 4s has a good connection and has a perfect WiFi with  fast connection for you to get more information about where the person lives what they are buying and what street they live in. also it has a map apps so the delivery person will not get lost and find the house quicker and faster. also iPhone 4s is a good phone because it has a note book app so you don't have to carry paper also you might lose the paper but if you write it on your phone you will not lose it.