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After briefly losing service, iPhone will fail to reconnect to cellular network until restarted

When my iPhone loses service for any amount of time, like when driving through an area that isn't covered or going inside of a building, the device will not reconnect to the cellular network once it is back in range. I have tried toggling airplane made to make it search again; this does not work. I have tried resetting network settings; this also did not work and now I have to re-enter the password for every wifi network (bummer).

The issues DOES resolve, however, if I completely power off the device and power it back on. Only to again reappear the next time I lose service.

What in the world is causing this and what can I do to fix it?

Things to note: MRI comes back fine. Issue JUST started this week. Device was restored about 3 weeks ago from backup because it is a replacement for one that I destroyed.

Message was edited by: Hydrochlorick

iPhone SE, iOS 10, null

Posted on Sep 14, 2016 1:31 PM

Best reply

metaprogressor

Level 1

4 points

Posted on Mar 8, 2017 11:21 PM

You have either to turn off WiFi or disable LTE in Cellular->Cellular Data Options. Must reboot after that.
It is a firmware bug which will never be confessed by Apple and fixed. Same as compass bug in 6s which is not fixed for 2 years now.

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44 replies

Sep 15, 2016 6:27 AM in response to Hydrochlorick

here is my link to my Issue.

Re: LTE Connectivity Issue after upgrade to iOS 10- SE

Sep 15, 2016 6:41 AM in response to Hydrochlorick

In my experience I was able to work around the issue by disabling LTE in the Settings app under "Cellular" -> "Cellular Data Options"

I don't get LTE, but I dont fall into the "no service" trap either.

Sep 15, 2016 6:50 AM in response to AJGT-0000

Then it must be an issue connecting to LTE. Maybe a new carrier settings update is needed?

Sep 15, 2016 6:55 AM in response to AJGT-0000

Have you tried data only instead of data and voice? If so, did that make a difference?

Sep 15, 2016 6:57 AM in response to Hydrochlorick

I have the exact same issue right after upgrading to iOS 10.0.1

iPhone 6

T Mobile 25.1

Anyone know how to fix this? I saw someone reached to Apple and TMobile. Any resolutions from any of them?

Sep 15, 2016 6:59 AM in response to Hydrochlorick

This is DEFINITELY an issue with carrier settings.

IF YOU HAVE THIS ISSUE: Call T-Mobile and complain. Ignore any troubleshooting their customer service rep tries (he's just doing his job, but this is above his pay grade). This cannot be fixed on our end. Just tell the rep to pass the message upward that we need a carrier settings update ASAP.

Sep 15, 2016 7:04 AM in response to Internizzi

No solutions as of yet. Nothing can be done on our end. T-Mobile needs to put out a Carrier Settings update. If you want to help the cause, call them and tell them exactly that. If enough people complain, they will act sooner.

Sep 15, 2016 7:06 AM in response to Internizzi

Apple wants me to set phone as new and try and see if it fixes issue. I can't until after work at 5 eastern time. T-Mobile is saying go to Apple. although one rep last night told me many people have experienced issues connecting to LTE After iOS 10 update. I gave the rep this link to check out. At this time, no one seems in a rush to fix this.

Sep 15, 2016 7:13 AM in response to Hydrochlorick

ive also started a thread on T-Mobile support website.

https://support.t-mobile.com/thread/134498?sr=stream

Sep 15, 2016 7:16 AM in response to Hydrochlorick

This is due to two possible problems. The less likely one being the sim card and the more likely one being that you have the iOS 10 Null. Upon updating there is often a failed line of cellular code Injected. To fix this you must reinstall the os again. This will not lose your data so don't worry. Before you do this please check the error logs...

Sep 15, 2016 7:21 AM in response to TechHelp101

How do i reinstall ios 10? I can't just re-download it like I can on a MAC os.

Do I just erase phone, set up as new phone, and then restore from backup? Or do I need to reinstall iOS 9.3 and re-install iOS 10?

Sep 15, 2016 7:23 AM in response to MSKapcala

Backup and restore the IPSW... If you need help with this write me back

Sep 15, 2016 7:26 AM in response to TechHelp101

I'll need help with this. Never done this before.

Sep 15, 2016 8:23 AM in response to Hydrochlorick

Seeing these replies makes me want to restate and clarify: THIS IS NOT AN ISSUE ON APPLE'S END. RESTORING YOUR DEVICE WILL NOT FIX IT. The device will still keep the latest carrier settings, which is what I believe to be causing the issue, so it will just come back and now you'll have wasted hours restoring your phone.

jjweid

Level 1

33 points

Sep 15, 2016 10:39 AM in response to Hydrochlorick

Same here. iPhone 6 plus on t-mobile, carrier settings 25.1. Have to reboot to get signal. I'm turning off the LTE option to see if it helps.

After briefly losing service, iPhone will fail to reconnect to cellular network until restarted