Hello guys. Currently Im using 6S+. I just bought 64gb and the same model/spec for my wife yesterday. First, I registered using my Gmail account as Apple ID. After completed registration process, I've tried to download apps (whatsapp, etc.), nothing happened. This was on cellular data plan and I dont think that my internet was the problem. My wife on the other hand, able to download any apps. So I decided to change my email to example@icloud.com by resetting my phone later and it worked. I can download any apps. The bad part is, PRE-INSTALLED apps are missing. How do I know? My wife got all this pre-installed apps. Been searching through the net, nothing can solved my problem. Please help.
Super noob here. Thanks.

I already tried using wifi. But nevermind. Problem solved. Thanks