Out of the blue my ZTE phone just shifted to "Safe Mode." I had not tried to upload a new app. I turned it off and took out the battery. Turned it off overnight, which I do not normally do. Still, every time I turn the pesky little thing on it opens in the "Safe Mode." The little owners manual says nothing about "Safe Mode" that I can find. While it's in this "mode" I cannot access any of my apps. The phone works fine, but I bought a "Smart Phone" to keep from having to run back and forth to my computer for needed info. Please, please HELP!