I transferred my sim card from my old phone to my new phone (both iPhones) and I am just very confused as to how all my apps, photos and contacts got there? What's more confusing is it's like a snapshot of my old phone at a certain point. For example, only texts up to the 5 June have gone to my new phone, and also matches from my old, deleted Tinder account have reappeared on my new account. How very strange 
I just want to know why really, help would be appreciated

I just want to know why really, help would be appreciated