it works if you are connected to a wifi network, if you are on 3g/LTE it wont work and the app will be "waiting" until you are connected to wifi, if it doesnt do automatically try disabling autoamtic updates and update it manually in the app store while connected to wifi.
Everything was running smooth until the auto updates started. 18 of my apps needed updates. Now they are just "waiting". I tried resetting the phone already. Resetting Settings too. Nothing. Any suggestions?