I truly enjoy using my Lumia640. Every time I try using my Galaxy S7, I can't believe how much easier things are done on my Windows 10 Mobile. Plus my battery is not depleted by the end of the day like it is on the Galaxy S7. I try and try and get used to using it, but I quickly switch my sim card back to the Windows Phone. It just WORKS!!!!. Its easier to text on, it works better with both my car's blue tooth systems. I used to love my iPhone first then my first Android phone the Galaxy S5, but after I saw I could get the Lumia 640 for $40 through AT&T, I had to give it a try. I have been hooked ever since.