Currently, the number of apps bundled with each iOS version on the iPhone has reached 32. And you can't delete these 32 apps, but thanks to the upcoming release of iOS 9.3, this is changing. Right now, you can only use iOS 9, but if you want to use version 9.3, you need to follow the article below.
Guide to deleting default apps on iPhone
To be able to participate in Apple Configurator, a program that allows organizations to manage iDevice devices, you must register and pay a considerable amount for it. So consider carefully before doing this, or continue using iOS 9 and refer to some very useful iOS 9 speed up tricks.
One note is that your iPhone needs to be checked for iPhone imei to verify that it is a genuine iPhone, as many cases involve readers using fake iPhones and therefore cannot perform tricks on the iPhone.
Hope this article helps you out. Additionally, if you're not interested in the above issue, for user data, performing iCloud backup on iPhone is the most convenient. Wishing you effective iPhone usage!
