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iPhone 12 losing service

Received my iPhone 12 Pro on Friday. Activated it on Saturday. Sunday I drove for 10 mns and when I arrive to my destination I saw no reception bars and No Service. And in the middle of the screen in a grey box: Your iPhone is not Activated.


The only way to get the connection back was to toggle Airplane mode to ON then OFF.


The iPhone had the cellular mode to 5G Auto. I switched it to LTE to test. And it was the same.


So I resetted the network settings: same issue and I resetted the iPhone as a new iPhone and reinstalled everything from scratch (not from a saved backup): same issue.


I drove my car and found the exact location where the phone lost the network. If the phone lost the network it means I reach the end of the coverage area from a certain antenna. It looks like something happened with the phone when I reach a zone covered by a new antenna.


I called my operator and they told me that everything is good on their end and I have the right SIM card for a 5G device.


I called the Apple Tech Support and they remotely installed on my phone two profiles:

  • Baseband and Telephony Logging
  • CFNetwork Diagnostics


I was able to replicate the issue after talking to the Apple Tech and I was able to submit the report.


I pushed a little bit the research and I found on Reddit a lot of people talking about the same issue not only on Verizon (my carrier) but also on AT&T. Just use the title I typed and you will find the article.


I never had such issue with the 11pro.



[Re-Titled by Moderator]

Posted on Oct 28, 2020 11:31 AM

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Question marked as Top-ranking reply

Posted on Feb 9, 2021 5:49 PM

I am surprised this situation has not been addressed properly by the carriers or Apple. They each seem to be ignoring and hoping the problem will go away. Which it will NOT!

Imagine paying hard earned money for a product that only works, "part-time"? Clearly that would be frustrating for all consumers. Nobody likes to waste money.

I was already given a replacement phone and SIM cards and guess what-neither of them corrected the issue. Once again today I have 1 bar, 1 bar of signal strength at home. My phone is resting on the table and only has 1 bar. No reason for that. Unacceptable. Then when I left the house for a short drive, I lost all signal strength for about 4 minutes, had to go in and out of airplane mode for the signal strength to reset. UNACCEPTABLE!

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956 replies

Feb 16, 2021 5:10 AM in response to Dogcow-Moof

I don’t think it’s a carrier issue. We were on T-Mobile when my husband and I both got new phones last month. He got an iPhone 12 mini and I got the iPhone 12 Pro Max both blue. We never had reception issues on our old iPhones but it was horrible when we got the new phones. Thinking it was a T-Mobile issue we switched to AT&T. Our service is still dropping out constantly. One bar of service at best. And we live in a major city with plenty of towers around.

Feb 16, 2021 5:23 AM in response to mishasmom

It could be your local AT&T towers use different base station controllers than most AT&T towers.


I can only state that I personally know of no AT&T customers using iPhone 12 family phones who are seeing these issues, and I regularly communicate with hundreds in some of the more population dense areas of the United States (mostly Silicon Valley.)

Feb 25, 2021 10:38 PM in response to joxesCA

Hi


Did you get any solution to your issue? I am from India and have been using the 12 Pro since Oct 2020 and have faced similar issue randomly atleast 3-4 times till date.


Toggling the Airplane button doesn't help me either. I have to shutdown and power on the phone again to regain the network. Although we don't yet have 5G here in India, I am using LTE with a physical sim and also an e-sim and both lose the network. Now these are again two different service providers, so I am pretty much sure there is no network or sim card issue.


Prior to this I was on iPhone X for a good 3+ years and I never faced such issue once.


But as I said earlier the issue is random and have faced this 3-4 times since Oct 2020.


Do let me know if you have found any solution on this.


Thanks.

Feb 27, 2021 3:34 AM in response to Nrk1983

No.


The iPhone 12 family of phones supports some additional LTE frequencies that older phones do not.


If the BTS tells the iPhone to use one of those frequencies but the tower itself has not been properly configured to use those frequencies, it will result in exactly what was described.


So for example, the iPhone 12 supports FDD-LTE bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 66 and 71.

The iPhone 11 supports bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 29, 30, 66 and 71.


So a greatly simplified and unrealistic example would be:


You connect to the BTS, and it notes that you are in iPhone 12 and can use FDD-LTE band 28 so it assigns you to that frequency.


However, there is no antenna on the tower conected for FDD-LTE band 28.


Your iPhone 11 doesn't support the band so it would never notice.

Other phones may not notice.

Once assigned to band 28, your iPhone 12 would report "No Signal."


When you reboot your phone, you reconnect to the tower and this time the BTS says "use band 26."


Your iPhone 11 can use that band, your iPhone 12 can use that band, and everything reports full signal and works beautifully.

Feb 27, 2021 3:21 PM in response to Nrk1983

Nobody seems to care about this problem. 3 plus months now since I purchased my 12 mini and none of the upcoming IOS updates seem to reference this issue or have a solution for this issue.

All anybody can do is remove 5G from your phone and remember to "toggle airplane mode", on & off, so that your phone can regain the service/signal strength.

After the numerous tickets I created with Apple and Verizon, do you think either has responded to follow up, offer a solution or have an update? Nothing at all. Just silence! What a shame!

iPhone 12 losing service

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