Sponsored Links: When the Huawei is locked, it closes any apps that were running prior to the screen being turned off. Surprisingly, this isn’t an issue, but is a feature of the phone. There is a solution to this, however, if you don’t want to use this particular feature. Solution: The P9 does this in an attempt to save battery power and reduce data usage. If you want to keep certain apps running when the phone is locked, go to Phone Manager > xx% remaining > Protected apps. On this screen, you can toggle which apps will remain running when the phone is locked, but you can only choose up to five.