I had the same problem 2 weeks after i got my ZTE piece of crap phone. I hate this phone. I read online from someone that they had the launcher problem also so i was prepared and as soon as it went down i swapped it out for a launcher from Google PlayStore. Its called ZenUI Launcher its 45mbs and has worked perfect but there are so many to pick from just take your time and read the reviews. Hope that helps.