How to Lock or Don't Allow to delete or install app in Iphone (Hide App Store)

Step by Step
I. Lock Iphone don't allow installing app or deleting app

1/ Settings (in phone)
2/ General
3/ Restrictions (off)
4/ Enable Restrictions (Enter a Restrictions Passcode)  and Re-enter
5/ click on "Installing Apps" and "Deleting Apps" to Disable







II. Unlock Iphone allow to installing Apps or Deleting Apps

1/ Settings (in phone)
2/ General
3/ Restrictions (on)(Enter a Restrictions Passcode)
4/ Disable Restrictions (Enter a Restrictions Passcode)