Use of data excessive mobile (cellular data) of Documents & Sync

I had a problem during the last 3 or 4 days of my iPhone using excessive amounts of mobile data.

Typically, in a month, I use about 3 GB of data. In the last 4 days I used more 2 GB despite spending most of the time in places with WiFi.

Once I realized that something was up (when I had to buy updates data in 72hrs 2 x 1 GB). I started to look for a cause by using the data provided under settings > Mobile Data (cellular data).

Tried a couple of things:

(1) under settings > iTunes & App Stores "use mobile data" has been attributed to.

It was weird, I'm pretty sure the last time I checked it was off. In any case, I changed it to off.

Under data Mobile > System Services, I could see the data used by iTunes had fallen back. This has helped reduce the use of data, but has not solved the problem.

(2) under settings > iCloud > iCloud Drive 'use mobile data' has been assigned to.

Didn't know it, but he found Googling for a solution. I changed it to off. Makes very little difference.

After making these changes I switched back on Mobile Data. I always saw use of massive data, about 50 MB in 30 minutes.

When I checked in Mobile Data > Services system by far the largest user of data is listed as 'Documents & Sync '. I don't know what it does.

I signed up for my iCloud on the phone. This sewing to help, but I couldn't leave it that way for a long time, because missed me my calendar and contacts so I signed in and turn all my iCloud (except mail) services.

So, as soon as now I have dial-up mobile data wide completely. I'm only able to use my phone on WiFi, so it is essentially a super expensive iPod Touch.

I really need help with this, I hope someone can tell me please a solution or at least explain what might use data labeled as «Documents & Sync»

If I can't get to the bottom of it I'll have to switch to another phone, my career here in New Zealand do not offer unlimited plans :-(

Some details on my phone and the settings:

  • iPhone running iOS 9.2.1 6 (13D 20)
  • Phone has 128 GB of storage with about 10 GB of free space
  • iCloud, I use it for everything except the storage of email and document
  • I have iTunes game, Apple Music/subscriptions
  • iCloud library is running
  • All I can find with a setting for her except for Apple's music is set to use only data on WiFi

An update.

It has been suggested that I have disable Wi - Fi pass to see if that would help.

I ran several tests. This apparently made no difference.

Tests in 15 minutes will help the periods that I sometimes see very low use with WiFi help on & I see still on a very high, sometimes use 4G data and WiFi turned off.

Worst when I was walking with WiFi and 4G data but WiFi help out I've seen data use of 39.5 MB in 15 minutes, this 35.1 MB was allocated the mysterious return «data & Sync»

Test details:

Test 1.

local time 10:00-10:15.

  • WiFi off
  • 4 G Mobile Data on and connected with good signal
  • Assist off WiFi
  • Changing the mode of the aircraft at the beginning of the test
  • Stationary situation during the test

Total mobile data use 1.4 MB

(Documents & Sync 3.2 KB)

Test 2.

local time 10:30-10:45.

  • WiFi on and connected with good signal
  • 4 G Mobile Data on and connected with good signal
  • Assist of WiFi on
  • Changing the mode of the aircraft at the beginning of the test
  • Stationary situation during the test

Use of mobile data total 57.8 KB

(Documents & Sync 2.1 KB)

Test 3.

local time 13:00-13:15.

  • WiFi off
  • 4 G Mobile Data on and connected with good signal
  • Assist off WiFi
  • Changing the mode of the aircraft at the beginning of the test
  • Stationary situation during the test

Total mobile data use 9.0 MB

(Documents & Sync 28.6 KB)

Test 4.

local time 13:20-13:35.

  • WiFi on but not connected to a constant signal
  • 4 G Mobile Data on and connected with good signal
  • Assist off WiFi
  • Changing the mode of the aircraft at the beginning of the test
  • Mobile location (market) during the test

Total mobile data use 39.5 MB

(Documents & Sync 35.1 MB!)

Tags: iPhone

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