No Service after iOS 17.0.3 Update

In Settings under Cellular do you have a message about an update required to use Cellular?

In Settings > General > About > any errors there or a > next to Not Available? If so what does it say under Not Available?

New update 17.4 came out and installing it helped! Everything is restored and works as before!

For me, it turned out to be the SIM card. Made duff by 17.2.1 I don’t know, but it didn’t work (no service) after the update. My provider proved it was faulty and supplied a new one, which got me working again.

3 hours at the Apple Store, replaced sim, and phone finally works.

Might save you all sometime. Go to cellular, select network selection. Than switch to automatic and/or select your service provider. Hope this helps!

$robmusiciv

I replaced the SIM card and haven’t had a problem since.

I had a m iPhone 12 Pro Max which was working fine.

About 3 weeks ago the 17.0.x upgrade option came up so ever the optimist I upgraded to (at the time) 17.0.2, and shortly thereafter, when switching between (I assume) different cell tower locations when I was using cell data (for GPS app and streaming some thing), it stopped working indicating I was Off-Line when using cell data service.

Cell phone service worked, basic text (not iMessage which uses Internet), when on wi-fi internet worked but no cell data internet worked.

I went to through multiple lengthy troubleshooting sessions with AT&T. They (1) had me reset m transfer in locally setting option

(2) they reset the connection cell service provider end

(3) turned on and off airplane mode

(4) powered off and on multiple times in the process

(5) swap from physical Sim to an eSIM

(6) per their recommendation, went to an Apple Store for hardware diagnostic, after I did troubleshooting with Apple, they said there may have been a problem with either the battery or the wireless charging functionality. It was suggested may need to replace the back board of the device (not the screen side) however the cost of that would be more expensive to swap out than it was worth. It was an older device so opted to an upgrade so I upgraded to 15 max Pro

Transferred all my files

Regretfully assuming all would be good I wiped the old phone to factory reset (which is supposed to reset all activations/ like find my phone) at the time

and it continues to be an issue.

I was on another call with my phone service provider and they sent it to their backend provider to troubleshoot without much luck.

There was indication that many of the recent request they’ve been supporting seems to occur following iPhone 17 updates

The latest suggestion after another session with AT&T was to swap out ATT Sims cards for a new Sims card with a new phone number.

I’ve not done this yet but will try it shortly and provide feedback on that if that helps.

I’m no expert but I do recommend not upgrading to 17 yet as this seems to likely be part of the problem.

I realize I’m late to the party but I was having this problem as well. Reset network settings, hard and soft reset as well. After I removed the sim car, wiped it off, stuck it back in, it worked. I haven’t had a problem since.

i believe the latest iOS releases are blocking certain frequencies and network IDs being exchanged with your cellular service provider. That is why, iPhone keeps searching for cellular service.

I fixed this issue by getting the latest physical SIM from my cellular service provider and inserting it in my iPhone. If your iPhone supports eSIM, delete it and revert back to latest physical SIM.

hope this helps!

same thing after updating to 17.4.1, reinstalling eSIM a hundred times, did everything in the prior reply did not work at all. need to restore and erase your phone to the factory mode(remember back it up before doing it) and got my network back but this is stupid

Switch OFF VPN!

I have a 12 mini and this worked for me:

• Turned off my Hotspot
• Service came back

I realize I’m late to the party but I was having this problem as well. Reset network settings, hard and soft reset as well. After I removed the sim car, wiped it off, stuck it back in, it worked. I haven’t had a problem since.

How to turn off the VPN on your iPhone

1. Unlock your iPhone and open Settings.
2. Scroll down and tap General.
3. Look for VPN & Device Management further down the menu and tap it.
4. Tap VPN. If your VPN is active, you'll see its status as Connected.
5. To deactivate the VPN, simply tap the toggle switch next to the VPN's status.

After updating the iOS I've had no signal. I've been on to my carrier multiple times, did a back up and full reset, I had signal on and off for a day. Today I have no service at all. I contacted apple who ran a diagnostic and they said I have a hardware issue, I've booked into have it looked at by apple. I don't think they will have an answer other than the phone has a signal fault. I believe after reading this thread it's definitely linked to the iOS update