[SOLVED] High usage of data on iOS9 on System Services -> General

[This is the description of the problema and what I have to do to solve the problem. It worked 100% for me. Sorry for my english.]

I recently having a HUGE issue with data transfer over celular network.

In less than ONE DAY, more than 1GB of data was gone over the description "General" in "System Services".

I don't know what's mean "General use" and why they started doing this. I know that happened a few days after I upgraded to iOS9, as no reason.

Well, a lot of people says over "Wi-Fi Assist", that wasn't the main problem.
Turning Air Plane mode on and off neither.

Reset the phone worked for some folks, but I don't wanted to get too far.

So, I turned off the use of celular data for ALL THE APPS first. - Reboot the phone.

Then, I turned off all the iCloud services and all the automatic download under App and iTunes Store. - Reboot again.

Then, in Fetch New Data under Mail, Contacts, Calendars, I turned off the "Push". - Reboot.

After all this, I started to turn ON the services again. First, the Push. - Reboot.

Then, I turned on the iCloud Services. - Reboot.

For the last, I turned on the data access ONLY for the necessary apps that I use (whats, telegram, face, mail... etc). - Reboot

For the moment I leave other apps without access to the celular network, I'll activate them when I need.

I know that probably I have rebooted the phone more than needed, but since I don't know what caused the problem (and what was the acting that solved it), I prefer to describe the entire (and repetitive) actions.

After that, the problem with excessive data was solved at all.

This is the second day using normally, the battery performance was awesome (1 entire day in heavy use) and the General uses only a few MB.

That's the solution for me, please comment if it worked to you too.

Thank you for the attention.