iPhone 12 losing service

Incorrect. I bought an iPhone 12 in red this past sat on 1-2-21. Love the phone love the color and I bought this bc my cousin has aids and it’s nice to see some of the money for the phone going to research to help cure it. Phone worked great the rest of sat and Sunday. Then Monday I’m on the phone all day with it working fine and it randomly ended my call saying no sim installed. Well I restarted phone thinking that’s the best thing to do. Tada my service was back. A min later dropped call again and same message no sim installed. I tried everything after that to figure out what’s wrong. Restarted it took sim out out it back in. Reset network settings reset general settings did everything you could do besides reset phone. I went to Verizon and they took my sim out and put it in everyone of the display phone with the service connecting immediately making test calls to their personal phones. The sim was good so I went back to apple store. Hooked up phone on diagnostics said phone checked out but every time they took sim out and put it back in the same message came up as no sim installed. They grabbed new sim activated it and still same message. Ended up replacing my phone on the spot with same exact one. Noted it down as a hardware issue. So far no problems but if it happens again I’m turning this is and making them give me the iPhone 11 Pro. I will not downgrade from the 12 to the 11. It’s crazy you spend all that money to get a defective device I thought I was the only one experiencing issues. I’m glad I’m not. Apple needs to fix this problem or give us our money back or let us trade in our phones. No use in having an expensive decoration that looks good but you can’t really use. I’ll keep this updated if I have anymore problems!

Apple did send me a replacement phone, iPhone 12 Pro in blue, but it did not come with Verizon version, rather the open version. So I have to call Verizon to ask for SIM card. When I told Verizon my connection issue as I was activating my phone, they actives my phone differently than the normal way.

They set up my phone as SIM card plus digital SIM card. SIM card for primary and 2ndary is digital sim. I would not have the option of 5G auto, 5G or LTE anymore.

So far, it is working ok. I only saw I lost cellular bar once, but still able to receive and call.

Please see the photo and how my cellular signal bars are a set.

we will see what happened.

It is. It accesses the same bands. Plus the iPhone also isn’t working properly on LTE only. It drops service consistently throughout the day. I’ve now put the bell LTE sim in the phone which does not have 5G access and same thing. Drops out consistently. It’s pretty clearly an issue with the device at this time.

My issue is fixed. It was a plan issue with my carrier. Unfortunately, I had to get a neighbor who works with my carrier to escalate in order to find someone to look beyond the obvious.

So thankful to have it working!

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.

That's not true.

The iPhone 12 family supports different frequencies than older iPhones, and Samsung doesn't list which frequencies they support.

If the tower tells the iPhone 12 to use one of those frequencies (which will be less crowded because few devices support them) and there are tower/MTSO issues that cause those frequencies not to work properly, you will see what users here are experiencing.

The bottom line is though many here (particularly on Verizon) see these issues, literally millions of iPhone 12 customers worldwide do not. The key is to figure out why.

If it were the phone, that would not be the case.

While the issues are not unique to one carrier, they are much, much more prevalent with certain carriers, notably Verizon.

I still wonder what would happen if someone with an unlocked iPhone 12 that drops calls regularly on Verizon swapped out their SIM for an AT&T one.

IPhone 12 Pro here . I live in an area where there are 3 towers about 5 miles away . I call it the Bermuda Triangle. And after talking with Apple support which didn’t help as they went through everything I had already done as proceed to put it off on Verizon so then Verizon put it back on Apple. From what I am understanding it’s is the problem with the iPhones handing off the signal between towers and where I live that is the perfect storm. Lots of other iPhones work fine here . iPhone 8 Plus, iPhone X, iphone 11 , anyway the iPhone 12 Pro will not receive a call and if it barely does you can’t hear anything and you will lose the call . It’s horrible and basically a phone that can’t be used and no word what so ever about when or even if Apple knows how to fix the iPhone 12 Pro. And yes I have tried resetting network settings, airplane mode , hard resets , you name it and it won’t fix it . Apple knows they have a problem so I am starting to think that if they haven’t fixed it by now these iPhone 12 pros may be no good

Well, it’s definitely a 5G problem. Like I said, I bought 3 iPhone 12’s and returned them all. Now, I have been using iPhone 11 Pro on 4G with no problem for a month now. No drops calls. Mostly full signal. No issues.

I still strongly believe it’s Apple with the problem. I have been doing a lot of reading on this. A lot of people who are using a 5G capable Samsung phone in the same house with a family member that is using an iPhone 12 have no problems. I guess, I might just have to purchase a Samsung 5G phone go test this theory out. I’m with Verizon by the way.

Agree. Have you contacted Apple and request to have your phone replaced? They sent me a open one that I could go to any carrier. Then, Verizon set up my phone with two SIM cards, one physical and one digital and I have not have problel since. I have Verizon and Apple 12 pro.

I have Verizon in the iPhone 12 Pro Max blue and I have the same problem with service cutting in and out very badly. Travel to Philadelphia a couple weeks ago and Service was in and out. Ordered a new Sim card activated it and still the problem continues. On the phone with Verizon for an hour and they let me know it is an Apple issue with software or hardware. No new word on the Apple update. Continuously having to turn my phone off and on which seems to fix the issue for a little moment but then jumps back to no service after a few hours. Hopefully this issue can be taken care of because my iPhone 8 had no service issues at all. I will say though in some areas I didn’t have very good service with my eight I do have service with my 12. Keep your eyes peeled for an update that may fix the issue.

I've gone through this before, but basically newer models of iPhones can use more LTE frequencies than older ones can.

When your phone connects to the cell tower, it tells the cell tower what frequencies it can use, and the tower says "use this one."

However, if the tower isn't properly configured, the frequency it tells the phone to use may not be one it is optimized for or can use at all.

It's like if you ask someone what languages they speak and they answer "French," and since you took French in high school you say "Oh, I speak French, too" and then the other person starts speaking in rapid conversant French because they lived there for two decades.

You'd be lost, even though you told them you could speak French.

I have an update since I have posted dozens of messages here about my issues after purchasing the iPhone 12 mini with my wireless carrier 3+ months ago. My carrier offered me a network extender(for free) so help boost the signal strength. After setting that up I immediately noticed I had 4 bars(consistently). It has been a few day since and those 4 bars have never changed. Plus, when I visit the garage I used to lose my signal. No bars in the garage. I have now noticed with the network extender and antenna, the bars in the garage are consistently 2 or 3.

I have to assume that this is because of the extender and not some update from Apple.

Anybody else have a similar experience?

AT&T said this is an trending topic on Apple and while Apple seeks a solution I should go to a store and get a new sims card.

Since this thread started it has been reported that some SIMs provided with new iphone12 by providers are faulty

Day 2 with no dropped bars or no service. Can someone else try enabling wifi calling and let me know if it worked for you?