iPhone 12 losing service

I had apple replace my red iPhone 12. They have to do diagnostic test first. Mine wasn’t reading sim yet the phones on display would. Replaced my phone and screen protector for free. Haven’t had any issues since. 5G doesn’t come up all the time but that’s not an issue for me as long as the phone works.

Good for you... you’ve added zero to this thread. I promise I’ve looked into this more then you, because I’m actually trying to find a fix for the issue OF NOT HAVING A FULLY FUNCTIONING OR RELIABLE PHONE and yes, there’s enough of a broad issue for this to be officially addressed by Apple. The world is a bigger place then you individually never dropping a call. This is a worldwide issue, not just an ATT or Verizon issue. I’m with VZW btw with a new sim and I know multiples that have had the phones replaced and still have the issue.

To share logic and facts.

”Phones replaced multiple times with the same problem” - that’s a carrier issue.

I’ve stated several times, the issue is probably due to the use of a particular brand of cellular phone equipment that has errors in their firmware that cause this issue to manifest. AT&T apparently doesn’t commonly use that brand where Verizon and other carriers around the world do. Having worked in telecom in the past I am very aware of how such issues propagate.

For example, classic AT&T step by step and 5ESs switchgear would allow you to wait a minute or more between entering touch tone codes and the call would still complete.

One common vendor’s switchgear today will not complete the call if the delay between successive digits is more than a second.

The fun part is you never know which type of switch your phone line will be assigned to, but it doesn’t occur because your home phone is broken.

You state you are a VZW customer; visit an AT&T store and ask to pop a demo SIM into your phone and do nothing more than see if you get a “no signal” error over say 30 minutes in the store.

If nothing else, it would be another data point.

I too have worked for a decade in telecom and have never come across an issue this dramatic to where the phone DEACTIVATES, not just drops calls. The close I’ve seen were with CDMA CSpire iPhones when they first launched with the iPhone 4S, but that was quickly corrected and was only an initial activation issue, not a reoccurring issue. This is AFFECTING EVERY MAJOR CARRIER AND IS UNACCEPTABLE.

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I doubt it’s a particular band issue. You’re just stating that because that’s the only thing you could find different. Just because a new chipset and firmware support a new band, doesn’t mean any of the carriers are using the new band yet.

Plus if a specific band was THE problem, it would be easy to mask that problem band.

Correct your not getting anywhere. The PHONE states it is deactivated anytime is loses reception... please explain how that’s a database issue when the phone itself loses internal activation when it loses connection to the database? The only thing I can see would be a phone carrier firmware issue, and like with CSpire that issue would fall on the carrier, but the issue is broader then one single carrier’s firmware and therefore is either an Apple OS issue or hardware issue. The only other thing it could be would be faulty API supplied to the carriers.

So what you’re saying is the phone deactivates itself anytime it loses reception? That’s easy enough to test with a Faraday bag.

Point is, were that the case everyone with an iPhone 12 that lived in a mountainous area would be experiencing the issue, and we don’t see every person whose ever driven through the Colorado mountains or rural areas of the US complaining of the issue.

Still, I’m willing to buy it if it can be reproduced with a signal blocking bag, but I don’t believe it’s that simple.

Just spoke to VZW engineer, said about another 30 days. Apple pushed updates in the 14.3 and 14.4 updates, however, things needed done at every tower in order to support the handoff from tower to tower. It is not backwards compatible to pickup a 3g signal it’s is only LTE and up. So when it cannot find the lte signal it doesn’t pickup the 3g.

Welp they finally broke me. I returned the 12 pro max. Incredibly frustrated mad and disappointed because the phone is awesome. How it cannot do the basic function of making a call from my home is beyond me. Good luck to all of you that keep fighting!

Today I called Verizon to check out the non working phones. They said that they had no clue about this issue. They will send me a new SIM card. Will this work??? I don’t think so. I believe is more an Apple problem that they do not want to take care of it. It is frustrating to not be able to use your phone and not to be able to take it to Apple to fix it because they don’t have appointments in weeks!!!

Apple did send me a new phone. However, at the same time, Verizon also gave me a new SIM card since the new phone Apple sent was unlock phone, so without Verizon,s SIM card, could not work.

when I was setting up the new SIM card, I let Verizon know my phone,s problem of connection, then they set up my phone differently. It has primary and 2ndary. I have not have problem since.

So, try the new SIM card first and let them know your problem also. If still does not work, ask Apple to replace your phone.

I still seen the wireles sign without any bar, but my phone is still working.

Almost 2 months ago Verizon sent me a 2nd phone and 2nd SIM card and still no luck. Does not matter how many phones they send you or SIM cards, that will not fix the issue. I am on my 2nd phone and still having issues. Nobody from Verizon cares and seems like Apple does not either. In an earlier post I discussed how Apple made a slight effort to call me and fix the issue. I did a diagnostic check and sent that info to Apple. Crickets since! No more phone calls and replies to my emails. RIDICULOUS!

Do yourself a favor and just get rid of it. There is no fix. Not sure if it’s Apple, carrier or both but it will continue to not work. What I do know is my 12 will not have service at my place of work at all. Also I often drop calls and service at home. But yet a 5g capable phone from Samsung works just fine at my place of work in the exact same place. At this point I don’t care who’s fault it is. I need my phone for work and it says no service for 8 hours a day.

Fair enough; I have not had a single dropped call in three months on AT&T with my 12 Pro Max.

The only factor that I can think of other than AT&T is that I do not have 5G on my cell plan.

Ultimately, you have to do what works best for you.

It’s perplexing, something I know that’s of little comfort.

So, your Samsung 5G phone is working in places where Apple iPhone 12 5G is not, it’s not a Verizon, AT&T or T-mobile issue. It’s an Apple issue with their phone. If the phone company was to blame, Samsung 5G phone will would also have a problem. I actually bought 3 iPhone 12’s and returned them all due to poor reception and dropped called. Very disappointed.