iPhone 12 losing service

Dunhill421 wrote:

I suggest you just let everyone tell their story and let Apple take all of this feedback and figure out what the problem is.

Are you giving the feedback to Apple Support?

Once again, if you're just posting here, no one who can address the issue at Apple will ever see it.

Apple Engineering does not read these forms except perhaps if a member reads them on their own time, but they don't on company time.

Likewise, Apple Support does not read these discussions except to monitor for violations of the Terms of Use.

If you do not contact Apple Support directly they will never know what you have to say, no matter how many times you or others post here.

I’ve spent countless hours on the phone and in the store with Apple techs

and T-Mobile techs at various levels. I’m done doing their jobs. I’ve provided them with a wealth of information and testing. If they reach out to me again and ask me to provide anything else, I’m happy to oblige. But I’m done being an unpaid QA tester for both companies.

Peter have you seen the several comments recently stating that people coming in and saying there isn’t a widespread issue are just trolling those who are having the issues? It’s actually quite condescending and rude. People are coming here in large amounts with the same issue. This thread is enormous. We are looking for solutions ideas and help. We don’t care if someone is level 1 or level 10. Only helpful comments and ideas are needed. Just keep your remarks helpful mate. Cheers

My wife and I both got iPhone 12 pros in October. ATT service at our house is poor, but we had been very successfully taking advantage of WiFi calling on our previous iPhone 8s. On the new 12 Pros however, virtually every call gets dropped with or without wifi calling on. If however we put the phone in Airplane mode, then wifi calling works perfectly. Of course everytime we leave the house, we have to remember to take the phone out of airplane mode so this is not sustainable or acceptable.

Apple needs to fix this problem that seemingly people all over the world are having!!!!!!!!

#832 is simply a Verizon test call. It doesn’t debug anything. If successful it confirms your phone is activated with Verizon. I suppose it could be used as a marker if an engineer were actively looking at the calls on your line.

Does nothing on any other carrier though.

With a new a iPhone 12 ProMax & a new 5G SIM card, my service improved about 50 percent. I still have a few drops & fade outs but much better. I have Verizon in the Las Vegas area.

My service is still a little worse than my old 6s plus but a big improvement over when I first got my first IPhone 12 Pro Max.

When you say texts, do you mean SMS messages (green bubble) or iMessages (blue bubble?)

If it's green, it's definitely a carrier issue.

If it's blue, it's a carrier cellular data issue.

It's important because the messages are sent in two different data streams; SMS messages are sent as part of the same data stream as audio call data, where iMessages are sent in the same data stream as web surfing.

In particular, if you do not have cell service and do not have Wi-Fi calling enabled (or your provider does not offer it) you would only receive iMessages but not SMS messages - so in your case is it green, blue or both you aren't getting?

You also can turn off the phone, remove the SIM card (be careful not to touch the gold contacts), wait a couple of minutes, then reinsert the SIM card, turn the phone back on, and allow a few minutes for a fresh network connection to be established. This should update the PRL

justlaur wrote:

Since Monday (it’s now Thursday), my husband’s phone (which was mine last

week) drops to no SIM and no service many times a day while we’re both at home on the same couch and mine (which was his last week) has functioned perfectly.

The bad news is that whether it’s a software issue, hardware issue, firmware issue, 5G issue or carrier issue - it’s affecting many people in many countries on many carriers and still hasn’t been fixed. It’s not my job to keep troubleshooting the issue for them. Apple and the iPhone 12 devices themselves are literally the only constants in this thread. Many carriers, many towers, many bands, many locations, many people, but only one type of phone made by one company. I’m counting on the company representing the one common element to provide the fix, regardless of whose fault it is.

There is no doubt whatsoever that a No SIM alert indicates a hardware problem. Whether that is a bad SIM or a fault in the iPhone can only be confirmed if you test by substitution (swap the SIMs between phones), which you hint at but don’t say explicitly. If the fault stays with the same iPhone when the SIM is swapped for a known good one the fault is in the iPhone, and it should be replaced under Apple’s warranty provisions.

The simple fact you identified the problems as involving many networks, towers bands, locations suggests there are still too many unknowns in play to determine a cause. The reported problems here represent a tiny percentage of iPhone 12 (whatever version) users, most without problems. If there was a defect in the phone (or software) I would expect it to hit many more users, like a whole batch of production likely to be hundreds of thousands. I think it is more likely there are multiple problems which happen to look the same from a user perspective although they have different technical causes. Unfortunately this makes fault finding extremely difficult because the users all maintain it is the same fault (what they can see) rather than raising individual support cases with their network and/or phone supplier, for individual fault finding.

if you’ve been following along, you’ll see that I’ve had multiple physical SIM cards replaced as well as eSIM added (with and without the physical SIM card installed) and “no SIM” persists on both physical and eSIM.

My iphone 12 pro has the same problem but with 4G. We do not have 5G in our country, however, the upper bars keep fluctuating from 1 to 4 bars most of the time it is 2-3 bars. I called Apple Support and they don't have an answer.

‏I don't completely lose the signal but some people told me when we tried to contact you over the phone, we got a message saying that you are out of coverage.

I think Apple has major issue with the iphone 12 signal with 4G and 5G.

I have 4 more phones (android, apple) and all of them are free of problems and give full 4 bars.

T Mobile new users here. Four new iPhone 12 minis. Two of the phones dropped signals routinely . Could not call each other in the home - straight to voicemail. Went shopping outside out area - one phone signal the other kiddo standing right next to me no signal. One of the phones also the missing texts issue. toggling airplane mode off-on seems to fix the issue of finding cell signal but also using in home WiFi. The two phones that had most reliable in home service were on T mobile WiFi; all the settings between phones are identical as best we know. Perhaps difference in user restarting phones or closing out apps affects signal reliability? Does not seem to be carrier issue- we T mobile ; I hope apple fixes this. For the desperate - toggling airplane mode was the only thing that made a phone use our WiFi for signal; resetting networks didn’t do that. Hope some apple engineers are reading this.

similar problem; 4 iphone 12 minis on T mobile.

toggling on to off for Airplane mode helps us. resetting networks not really.

some of the phones with the same settings have signal in the same room some don't.

think it has something to do with how individual users , turn on/off their phones and/or close out apps. The phones that "work" are using or in home wifi the most. Toggling the problematic phones from airplane mode immediately hooks them up to our wifi. Pretty wild that the same brand new models will have variability in performance in the same house (with same network/wifi settings) based on different user habits.

we have four new iphone 12 minis - two with 128Gb two with 64Gb -- the 128Gb versions had the problems the most. (we tried to set all the settings the same; activated the same day /bought the same day)

don't know if that is hardware or software but toggling off from airplane mode seems to fix it.

justlaur wrote:

if you’ve been following along, you’ll see that I’ve had multiple physical SIM cards replaced as well as eSIM added (with and without the physical SIM card installed) and “no SIM” persists on both physical and eSIM.

Yes, which is why I said your fault appears to be a hardware defect in the iPhone. Get the offending device replaced under warranty.