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macskittyy
User level: Level 1 (5 points)

How to install upgrade using 5G network

I couldn’t upgrade to iOS 27 using my cellular, even if I turned “Allow More Data on 5G” still it wasn’t working. It’s extremely inconvenient and annoying if WiFi access isn’t available. Anyone knows how to fix that issue and allow cellular to install the update?

Posted on Sep 17, 2026 4:09 PM

6 replies

LotusPilot
User level: Level 10 (334,506 points)

Sep 17, 2026 4:47 PM in response to macskittyy

Before attempting to upgrade to iOS 27, you must first ensure that you have updated your iPhone to iOS 26.6.2 (or later).


The iOS 26.6.2 (and subsequent iOS 26.7) update explicitly fixed a bug that may prevent update of the iPhone over a Cellular connection.


About iOS 26 Updates - Apple Support

Bob Timmons
User level: Level 10 (199,348 points)

Sep 17, 2026 5:06 PM in response to LotusPilot

The "Catch 22" here is that you cannot update the iPhone to iOS 26.6.2 or later using a cellular connection.


In other words, 26.6.2 will allow future updates using cellular, but the 26.6.2 update or a later update will first need to be installed using a good Wi-Fi connection.


Once 26.6.2 or a later iOS version is installed.......then.....future updates should be allowed using a cellular connection.


Unfortunately, Apple fails to mention all the details in the standard release notes for 26.6.2.

ckuan
User level: Level 10 (122,944 points)

Sep 17, 2026 5:34 PM in response to macskittyy

macskittyy wrote:
Could you tell me how? I have a MacBook Pro

Update using your computer

  1. Connect iPhone and your computer with a cable.
  2. Do one of the following:
    • On a Mac (macOS 10.15 or later): In the Finder sidebar, select your iPhone, then click General at the top of the window.
    • On a Mac (macOS 10.14 or earlier) or a Windows device: Open the iTunes app, click the button resembling an iPhone near the top left of the iTunes window, then click Summary.
  1. Click Check for Update.
  2. To install an available update, click Update.


racerhomie
User level: Level 2 (303 points)

Sep 17, 2026 5:26 PM in response to macskittyy

Use a PC or Mac to install the update. There may be a bug preventing you from updating using 5G

razmee209
User level: Level 10 (205,348 points)

Sep 17, 2026 4:39 PM in response to macskittyy

macskittyy wrote:
I couldn’t upgrade to iOS 27 using my cellular, even if I turned “Allow More Data on 5G” still it wasn’t working. It’s extremely inconvenient and annoying if WiFi access isn’t available. Anyone knows how to fix that issue and allow cellular to install the update?

Please contact your phone carrier and let them know how annoying it is, that you pay them a monthly fee to use their service, cellular data to upgrade your device.

macskittyy Author
User level: Level 1 (5 points)

Sep 17, 2026 5:31 PM in response to racerhomie

Could you tell me how? I have a MacBook Pro

Originally posted at discussions.apple.com/thread/256359326