There are many reasons for the problem in the Play store . 1. If your phone is rooted , there may be an IP address block . Because Google does not grant routes. It's a little complicated process. 2. If there is a problem with the download , you go to settings - Apps manager and select play store : and clear cache twice . 3. If your phone has Restrict background data On , then remove it. 4. Stay in the play store while downloading , and use 3G net as much as possible . 5. Make sure your download location is OK.