My phone continues to tell me that I don't have a SIM card when there has been one in my phone for 2 years. What the heck is going on again with this sorry network?
Good morning. Lets work together, to see if we can figure this out. Was this an unlocked S7? Have you received any recent updates on the phone?
Sometimes SIM cards go bad. I would suggest stopping by a store to get a new one. You can find the closest store here, https://sprint.co/2K334ab.