How do I disable this prompt?

Question

Every time I boot my phone, I get a message about not having a cellular carrier.
I only use my phone for gaming, so I select "No". Selecting "yes" leads me into something where I might select a carrier, but I cannot fill it out, because I do not have a carrier. The app launches automatically but is not obvious what it is called. The phone's OS is Android version 7.1.1. The phone is a ZTE N9560.

How can I permanently disable this message?
Where are applications that start on boot configured / stored?

Is that a full screen message or just a dialog? Do you get to use the overview button when you see that message? If yes, does the app not show up in the recent apps list? — Firelord, Jul 26 '17 at 00:51
Is there a sim card in the phone? Maybe just putting a sim card in the phone will stop this ( be aware this can have privacy consequences) — Willemien, Aug 02 '17 at 07:00

score 1 · Answer 1 · answered Jul 29 '17 at 09:31

The files that gets executed during booting process are definitely located in the root folder and also some of the files under system/xbin folder....

You can't access both root and xbin folder unless you have administrative permission (clearly speaking unless you have rooted your phone)

If your phone us rooted you can access the folders using root file explorer or android terminal and delete the files which are creating problems.

How do I disable this prompt?

1 Answers1