How do I delete phone storage space?

You can free phone storage in Android mobiles by uninstalling the apps and programs that you do not use.

Other steps you can take is if your device has an SD card, you can move a number of apps there. You can use apps such as AppMgr III, Apps 2 SD and others that can move those apps properly. You can also clear the device's app cache or data from time to time. In addition, there are apps out there (ex: Clean Master) which can scour your phone's internal memory and clean out any junk files for you.