Apple celebrates one billion iPhones
My father is still using an iPhone 4, 6 years after its launch  and is now thinking of upgrading to a 7 in the fall and I have had a 5S for 2 years now and think I can pull another 2 years before I upgrade. These phones have longer lives then they use to but Apple sales I believe will remain steady since some old iPhone user has to upgrade and they most likely will pick an iPhone. There isn&#x27;t much reason to switch to Android at this point.<p>The only thing that could take them off there perch is another revolutionary device showing up on the scene, but I think that won&#x27;t happen for another decade.