I was on my iPhone 5 on a Wi-Fi network. I was on eBay and I was just about to buy an item. I saw my Wi-Fi indicator shut off and switched to the LTE. I stopped where I was in the transaction and then the Wi-Fi symbol came back. I was wondering if somehow someone got in my iPhone. Saw i was about to send fiance info. tried to grab it on the LTE and when I stopped, dropped what they had done and restored my WiFi. I have never seen this happen before. I was a a place where many people are and have access to the Wi-Fi and a computer we all log onto.