system services using large amount of data

thebro20

macrumors regular
Original poster
Sep 7, 2014
168
58
I hadn't encountered this issue until iOS 10. Ive been getting the notifications that I'm getting near the end of my data cap etc etc

so I've been resetting my data usage on my phone, this month, system services has used 995 mb. When going into that further, something called DNS services has used 768 mb.

My question to you all, 1. is that normal? & 2. what is DNS services?
 
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deano1972

macrumors 6502a
Sep 16, 2016
541
225
United Kingdom
768mb? That's not normal at all .. for comparison system services has used 21.1mb and DNS services has used 1008kb in the last 11 days on my iphone 7
 
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thebro20

macrumors regular
Original poster
Sep 7, 2014
168
58
I wonder if its just a glitch that it says that's what is using the data, or if maybe I need to do a restore
 

jav6454

macrumors P6
Nov 14, 2007
16,864
1,480
1 Geostationary Tower Plaza
I hadn't encountered this issue until iOS 10. Ive been getting the notifications that I'm getting near the end of my data cap etc etc

so I've been resetting my data usage on my phone, this month, system services has used 995 mb. When going into that further, something called DNS services has used 768 mb.

My question to you all, 1. is that normal? & 2. what is DNS services?
1. Normal can be anything depending on your phone's current usage rates.

2. DNS services is basically phone book IP Address that the iPhone keeps on hand to call in for an another address. Also has to do with your carrier settings. When you use your browser, the iPhone pings the DNS Server for a request of an IP Address. This data is transmited back to your browser which then loads the appropiate pages.
 

deano1972

macrumors 6502a
Sep 16, 2016
541
225
United Kingdom
1. Normal can be anything depending on your phone's current usage rates.

2. DNS services is basically phone book IP Address that the iPhone keeps on hand to call in for an another address. Also has to do with your carrier settings. When you use your browser, the iPhone pings the DNS Server for a request of an IP Address. This data is transmited back to your browser which then loads the appropiate pages.
It should be very small amounts of data though, I would say anything more than a few MB for dns services for every GB of data used is not normal. I would expect to see over 700mb data used by dns services if the op had used half a terabyte of mobile data. Something on his phone is continually requesting dns data in my opinion.

Perhaps reset network settings and do a hard reboot?
 
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thebro20

macrumors regular
Original poster
Sep 7, 2014
168
58
It should be very small amounts of data though, I would say anything more than a few MB for dns services for every GB of data used is not normal. I would expect to see over 700mb data used by dns services if the op had used half a terabyte of mobile data. Something on his phone is continually requesting dns data in my opinion.

Perhaps reset network settings and do a hard reboot?
My data allotment resets on the 26 so ill reset the settings and see what happens
 

ericwn

macrumors 68030
Apr 24, 2016
2,766
1,677
It should be very small amounts of data though, I would say anything more than a few MB for dns services for every GB of data used is not normal. I would expect to see over 700mb data used by dns services if the op had used half a terabyte of mobile data. Something on his phone is continually requesting dns data in my opinion.

Perhaps reset network settings and do a hard reboot?
I don't think a forced restart does anything good but reset network settings would be my first try.
 

Phil A.

Moderator
Staff member
Apr 2, 2006
5,499
2,280
Shropshire, UK
I hadn't encountered this issue until iOS 10. Ive been getting the notifications that I'm getting near the end of my data cap etc etc

so I've been resetting my data usage on my phone, this month, system services has used 995 mb. When going into that further, something called DNS services has used 768 mb.

My question to you all, 1. is that normal? & 2. what is DNS services?
I haven't reset my stats for 3 months and DNS services is at 43mb so I'd say it's far from normal!
 
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