When I download a free app in appstore it says “amd action:authenticate:sm” When I download a free app in appstore it says "amd action:authenticate:sm". My device is iPhone 5c. How can I solve this problem???
You can try adjusting your iPhone clock to your current location.
Go to Settings > General > Date &amp; Time on iOS and set your time appropriately -either manually or automatically by switching the "Set Automatically" slider to on.