To download the latest version some necessary steps have to follow. First, you have to ensure that any old version is not present on your phone Go to the name download button Click on it and wait for some time. Screen home will show option one please cancel and other is install, tap on the install option. May your phone ask you some permission if you are new to download. For these, you have to go to settings look for security, and tap on the unknown sources to allow. Again tap to install  Now you will be able to collect and create your guns