If you own an iPhone 5c, 5, 4s, 4 or earlier. Get rid of it ASAP. Apple is already beta testing iOS 11. They have already confirmed they are withdrawing support for these models as they are only 32 bit compatible. All of Apple's newer models are 64 bit. All applications that previously operated on 32 bit will no longer work with iOS 11. There will be no upgrades or further support. Obviously, the devices will still work as phones.
Now is a great time to bail out before these devices are totally worthless. Many carriers are offering Port-in promotions and Buy Out offers. Ask me for details.
Joel Saltzman has over twenty years of wireless industry experience. He is currently CEO and Chief Wireless Analyst for Dr Wireless.