How to Update iOS 12 with Cellular Data – iPhone

iPad Help, Tips & Tricks
// October 10, 2018

How To Update iOS 12 with Cellular Data on iPhone – (Please don’t use Cellular Data to upgrade iOS) – can be quite expensive “Most unlimited data mobile plans aren’t really unlimited”)

Apple has done many updates in their operating system, and the latest update is iOS iOS 12. Many iPhone 6 users are interested on how to update their devices using cellular data. Some iPhone 6/iPhone 7 Plus users with 3G or 4G network have more than enough MBs / GBs with really fast downloading speed. But, can we download iOS 9/iOS 10/iOS 11/iOS 12 update with cellular data?

Many carrier networks have fair usage policy regarding the usage of unlimited 3G and 4G. This is to make users be cautious about downloading huge files. iOS 10.3.1 has 1.5 GB, and downloading this update using cellular data will definitely give you higher chances of huge amount of mobile bill by the end of the month.

You may try to take the risk of paying huge amount of bill(Some mobile plan say UNLIMTED DATAS but “Most unlimited data plans aren’t really unlimited”). Inside your mobile plan contract you can find out the details of how much data they allow, for most mobile(verizon/T-Mobile/AT&T/Sprint) carriers set a certain amount of data that you can use at the fastest speed. After using those highspeed data, any extra data will be slowed, which meant after using like 6-10GB of data. You will experience very slow mobile speed.


Apple Stops the Device From Using Your unlimited Cellular Data on upgrading to iOS 10.3.1

Because iOS iOS 12 is a large firmware updates, Apple stops automatically the usage of cellular data on update. The cellular download cap is actually 100 MB only which means that files with more than 100 MB in size cannot be downloaded using your mobile data or cellular data.

Apple does not let the usage of cellular data to download updates for iOS iOS 12. To download the latest update.

Enable Personal Wi-Fi hotspot while your cellular data is on and update your device using WiFi hotspot.

That is the only solution to get the latest version for your device updated with Cellular data on iPhone 7 Plus.

Note: if you disconnect midway on the download of the iOS iOS 12, you can resume it.

Upgrading to the latest iOS iOS 12 at home with a Wi-Fi connection is the simplest and best way. If you’re busy just wait till you have time at home.

If the latest iOS iOS 12 update is missing with Wifi connection,

Try turning Wi-Fi Off -> Turn on Cellular Data -> Check Find Update -> Turn back on Wifi and you can see the latest update


Can you download Apps with cellular data? Yes you can download apps with cellular data, but you’ll be limited to downloading maximum of 100MB. Apple did this to save you cellular data. Only big game Apps will be over 100MB.

Excessive Cellular Data Usage After Updating to iOS iOS 12 – General

Many people complain about the extreme increase of their cellular data usage after updating to the latest iOS version. Some suspect that the feature Wi-Fi assist is the main cause of the problem. Why is this happening?


The iOS 9 feature WiFi assist automatically switches iOS 9 devices from Wi-Fi connection to cellular data whenever WiFi is weak. Its’ goal is to detect any slow or weak WiFi connection and automatically switch to cellular data immediately. This feature can be useful for people with unlimited cellular data, but not for everyone else which consumes all data without our permission.

To solve this problem of excessive usage of mobile data, just switch off WiFi assist.

Go to Settings, then choose Cellular or Mobile Data. Look for WiFi assist and turn it off. After disabling, iOS 10.3.1 will not consume your cellular data anymore for frequent updates, surfing, music when you are connected to your WiFi.

Updating the latest iOS 12 to fix minor bugs and issue.

11 thoughts on “How to Update iOS 12 with Cellular Data – iPhone

  1. Azizurrahman says:

    My mobile iphone 6plus I want software update my SIM card data how i can update

  2. Just Me says:

    It’s actually simpler. Get a tablet. Share your iPhone’s mobile network via a personal hotspot, to the tablet. At the same time, connect the two devices via Bluetooth. On the tablet, open tethering and share your tablet’s internet connection via Bluetooth. Then the iPhone will loop it’s own mobile connection through the tablet and back, but will allow the iOS to update.

  3. Roger says:

    Most of what is stated here does not apply to me and is misleading. I have an unlimited Wi-Fi plan with Verizon that gives me 15GB at 4G speed before dropping me to 2G speed, and I have an unlimited iPhone cellular data plan with 18GB at 4G speed before dropping me to 2G speed. These are my only connections to the internet. I pay a fixed rate no matter how many GB I use, so there is no reason that my iPhone should be limited in the size of file it downloads in its cellular plan. Thus I’m forced to connect my iPhone to my Wi-Fi, consuming its 15 GB allotment, and then to connect my computers to my inconvenient iPhone hot-spot because my iPhone has used up the 15 GB Wi-Fi allotment.

  4. wells Jonathan says:

    Having problem with updating iOs, Call 1-888-588-21O8

  5. sachin shukla says:

    no update my i phn x

  6. Abhaykapadiya says:

    Install to my iPhone5 iOS 10.3.3 update please

  7. emma says:

    i just want my iphone5 updated See if my batterery is knackerd or not

  8. Vee says:

    If you have to use the same device’s cellular data to update….

    1) Tether your iPhone/iPad network to a mac using USB cable ( usb tether option)
    2) Create a Wifi hotspot on Mac from the above tethered usb connection.
    3) Go back to your iPhone/iPad and connect to the hotspot from mac.

    Thats it, we have fooled the iPhone/iPad to use its own mobile network as a Wifi connection.

  9. M Al says:

    I do not trust wifi!!!!!!

  10. Christine Deepa says:

    What is the difference if I use the data card in a setup box or a data sim device why does not apple allow me to download. Well if it is slow let it download that whole time when I do not use. I do not understand why technology should be psychological exploitation.

  11. Benny says:

    Opened a Wi-Fi hotspot and got my update done.

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