Siri not working over LTE in iOS 8.4

BBeen having this problem in mid Missouri for the last 2 days. Finally started working around 9 pm CST. Interestingly it wasn't working on some family members devices even though they hadn't been updated yet. As weird as it seems it obviously wasn't a bug or it wouldn't have fixed itself. Thank goodness I can use Siri on my watch again. It was pretty worthless without dictation.

It didn't fix itself—it just didn't require any intervention from users to work properly again.

In my post from earlier in the day, I suspected AT&T had blocked access to Siri for whatever reason or by accident. Once they re-enabled that access, everyone was good to go again. It would be like your ISP blocking CNN's website and then allowing it again—you wouldn't need to do anything for it to work again.

All clues point to AT&T as the culprit.

Looks like the issues I've been having today were fleet wide, so to speak. Today, from about 8.30am PST until about 6.30pm PST, I was unable to use any Apple services (Music, Find my Friends, App Store, iTunes Store, etc) via my phone or via AT&T's network. Since then, it looks like everything is back up.

But that doesn't explain why I wasn't able to tether on my way to work this morning. 😟

Regardless, it looks like it's fixed out here in the Bay Area.

I have iPhone 6 iOS 8.4 with AT&T. Siri works both with wifi and cellular data. I did restart my phone earlier if that helps.

South Florida appears to be restored. Siri working...

Same for me on my ATT iPhone 6. Reset network settings. Siri only works on Wi-Fi. No help from Apple.

AT&T is still reporting LTE outages throughout the country. Not strictly an Apple issue. I'm in Baltimore and things seem normal this morning. You might try disabling LTE to see if that would help if you're still having problems but it might not.

Cannot even access AT&T account site. They are having major problems. Being reported by multiple subscribers.

The issue is resolved! It was an ATT issue. Unfortunately, I spent about 2 hours resetting my phone, downloads, etc. at the recommendation of APPLECARE. But, my phone is now really up to date and working fine!

As I said there is still sporadic outage. Check the outage map. Still quite a bit of red

https://downdetector.com/status/att/map/

It's not obvious, but the map is not AT&T's official map. It is an independent monitor that uses crowd-sourced reports, so there will be a lag in what is displayed.

Reset all settings and Siri should come back -- not just network settings, but "all settings."

Siri iPhone 6

Working With WiFi and Data

Problem: Siri not working or only works when phone is connected to WiFi.

THIS SHOULD WORK WITH iPHONE 4S AND 5 AS WELL AS iPHONE 6.

First thing to do is to turn off WiFi Connection so you can check out if Siri is working with your Data Connection.

Settings > WiFi - Turn It Off

Now - Follow these steps:

Settings

Cellular > Scroll down to Use Cellular For:

Siri > Locate Siri and check to see if it is turned on. Turn it on!

NOW IF Siri IS NOT LISTED:

Settings

General

Siri > Turn off Siri wait a 10 seconds and turn it back on

Now return to home page.

Quick Reset of iPhone:

Hold down the HOME BUTTON and the POWER (Sleep/Wake Button) at the same time until the Apple Icon appears. Wait until it completely does the Quick Reset. This will take a little while! After it is completely Reset try to use Siri again by asking it a simple question.

If this fixes the problem be sure to go back to settings and turn the WiFi back on.

This method should work if for using both WiFi and Data. If Not! Call (800) 694-7466 Apple Support.

I certainly hope the OP has resolved this issue in the 2 1/2 months since posting.