You're missing the point. The FOUR year old iPhone 6 is at the END of its lifecycle and soon Apple will add it into its list of "Vintage and obsolete" products.
Besides, 4 year of usage means worn out battery, charging port, headphone jack and the home button. You have no idea how many iPhone 6's I've seen with mismatched home buttons (Black home button on a white iPhone or vice versa).
It's like buying a 300k mileage car riddled with problems like leaking gaskets, low engine compression and mysterious rattles in the engine block and chassis!
And no one uses iMessage and Facetime here, two hallmark features of iOS and don't get me started on Apple Pay and iTunes! And as for iCloud Synn; we have Google Drive on Android which is a superior service by all accounts.
You have to have a Mac PC and be deeply invested in Apple's Ecosystem to warrant the purchase of an iPhone.
I rest my case!