Re: what sd card for microsoft lumia 640 lte?
I have one of the Samsung EVO microSD cards - 64GB. It's a Class 10 and I cannot complain about its performance. Sure it's about half the price of the phone itself (lower if you shop around) but overall I think it's a better investment because you are getting the faster transfer speeds. I definitely saw the performance difference on my Nikon when I switched from a Sandisk to a Samsung Class 10. I do see apps that I have installed to the SD card and have live tiles become available more quickly, and they seem to run faster than with other cards I've used. I could have had a bad card, but I think after buying several different cards over the years and using them in my devices with varying degrees of success I can say that you get what you pay for. 64GB for a Windows Phone is probably overkill now, but with the newer devices I imagine people will be maxing out their 128GB cards and looking for larger capacities.