Loss of Cell Connectivity After IOS 16.3 Update- iPhone 13 Pro Max

Loss of Cell Connectivity After IOS 16.3 … - Apple Community

Yes!

Tried resetting network settings: worked for a few hours then problem returned

Tried resetting phone with erase all contents and settings, but problem returned

Called apple and they said to try full restore, plugged into Itunes. Waiting to see if it holds. 

Seems Verizon needed to release a carrier update but didn't, and the new IOS can't negotiate with their network very well. apple blames verizon, verizon blames apple. BTW I pulled the sim and put it into another phone with IOS 16.2, and it worked perfectly, so its NOT the sim, or the verizon account that is the issue. It is a fight between the new IOS 16.3 and the cell phone networks.

I’m using the 14 pro max and had the same issue. iMessage/calls worked when talking with others who had an iphone but couldn’t send regular texts or calls on android or landlines. Data up top said I had 5g full bars although they were grayed out. Speedtest on goolge confirmed data was working properly. Anyways my carrier had me reset my network settings and that seems to have fixed the issues so far. Calls/texts to any phone now seems to be working. Starting to think I should have waited to update 😅😅

Update: It didn't hold.

Took it to Verizon store, and they said the problem is rampant. They had to replace the phone! The phone which was working perfectly in 16.2 is useless in 16.3. OBVIOUSLY its an OS bug with Verizon's servers. May be other carriers too, I don't know. But the store is replacing phones right and left because they can't fix it.

Tell her to contact her cellular carrier, they are the ones who can resolve the issue.

"SOS Only" mode means no usable signal on the network she subscribes to but there are other cellular signals the phone can connect to (say no AT&T signal but the phone sees a Verizon signal.)

This is the same frequency/base station issue covered in other threads here, and has to do with settings at the cellular tower.

You may also want to do a manual check for a carrier settings upgrade just to be safe:

Manually update your carrier settings on your iPhone or iPad - Apple Support

GPTitan Said:

"Is anyone experiencing frequent loss of cell connectivity after updating to IOS 16.3?"

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No. I am not having this issue.

Troubleshooting Cellular Connectivity:

A. "No Service":

Is "No Service" shown on the top-left corner of your screen? If so, go here to fix that: If you See No Service or Searching on your iPhone or iPad - Apple Support

B. No SIM":

"No SIM"*** is shown on the top-left corner of your screen. So, go here to fix that: If you See 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support

C. Contact your Carrier:

Having issues with Cellular, contact your Carrier, asking them to configure this to the correct settings. They configure all of this in the SIM card.

Again, it's best to contact your carrier and ask.

iOS 16.3.1 may contain a different set of carrier settings than iOS 16.2 has, which is what the tower uses to determine your device's frequency capabilities; it's also possible your SIMs/eSIMs are different between your two iPhone 13s.

You may want to check Settings -> General -> About and scroll down to the "Carrier" field and make sure the Name and Carrier revision field are the same between your two iPhone 13s.

GPTitan Said:

"Is anyone experiencing frequent loss of cell connectivity after updating to IOS 16.3?"

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Report this to Apple:

Do your Part: Provide Apple with feedback on this, letting them know about this issue.  Apple may not get back to you directly, but the more feedback they receive on this, the more they will know what is occurring, and what bug fixes to include in updates to come. Apple probable has received little to no word of this issue.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: that this all began after installing an update, and how you have troubles it thus far. Include the URL of this post.
4. Proceed from there as necessary

Jimi2040 wrote:

Not necessarily cellular connection issues as far as phone service goes, but since going to 16.3, when I leave the house in the morning and get away from WiFi, I have no cellular data. I’ve been having to reboot my phone every morning in order to correct it

When you leave the house, you are using a data connection over the cellular network, so it is an issue with your cellular provider.

For most your phone service and data service are two different subsystems and thus reside in two separate databases, so issues can arise.

Contact your cellular provider for assistance.

Try force restarting your phone volume up volume down press and hold side button in a fast sequence

Ultimately, Verizon was unable to resolve the issue with a SIM card, electronic sim, or resetting the phone. They advised replacement. The phone seems to be the issue, not the iOS or carrier. Taking it to Apple tomorrow.

Serbia. I have 14 pro max with two esims from different network providers. After updating to 16.3 I have no network. I contacted the provider, but there is no problem from their side, which is what common sense tells me, because it would be very strange to lose signal from both providers in one day, and that's right after updating. Obviously, Apple is the problem. I'm planning to go to the service center but I'm not optimistic. I tried everything, nothing helps. If someone managed to solve the problem, I would be grateful for the help.

For Christmas I bought 3 iPhones: 2 iPhone 13, 1 iPhone SE 2022. In this way at home, my wife, my children and two for me, we have total 5 iPhones ( iPhone 13 - 2 pcs, iPhone 12 - 1 pcs, iPhone SE 2020 - 1 pcs, iPhone SE 2022 - 1 pcs). Only my phones are with 16.3.1. Only my iPhone 13 with 16.3.1 has cellular problems. My wife uses also iPhone 13 with iOS 16.2. As we live together our phones use the cellular in the same places. She doesn’t have any problems. All this leads to my thoughts that iPhone 13 with IOS 16.3.1 has problems. I do not see any possibilities that the cell has anything to do with these problems. Correct me if I am wrong but with 5 iPhones at home the problems appeared suddenly only on my iPhone 13 only after updating to IOS 16.3.1.

No.

Contact your cellular carrier, they can look at their network and see if there are any issues in your area.

Contact your cellular carrier for assistance.