With recent updates to iOS, I am having problems reconnecting to WiFi after sleep mode. Reconnection sometimes takes a few minutes. During that time, I cannot obtain data, even though I have cell and LTE service. Curious is that in Settings, it shows I am connected to WFi, but signal strength does not show at top of screen until reconnection occurs. Please let me know if you have had this experience and know how to fix it. I did recently purchase a new ASUS RT-AC88U WiFi router. Not sure if it is compatibility problem or something else.