Phone calls drops + wi-fi issue on Iphone XS max

I have had the problem for a month and went back to my old X. People keep posting to turn off LTE and someone marked it as an answer. Disabling functionality is not a solution to the problem and at best is a sort-of work around although it still doesn't eliminate all dropped calls. After Apple loaded some logging profiles and collecting data, what they confirmed is that I dropped many calls, as much as 15 times in a half hour. Hardware tests looked like all worked fine. Dropped calls were particularly bad if I was driving around an it appeared the phone could not make the handoff to the new tower. Apple agreed to replace the phone last night, on them, and not using my Apple Care. I drove around tonight and made a call from my new phone to an old 6S Plus. Went all over the city with the phones connected for more than 2 hours without dropping a call. It appears the phone swap resolved the dropped call issue. I saw someone else say they swapped the phone and walked out of Apple and had the new phone drop calls. I suspect either a bad batch of the new Intel cellular modems or maybe just poor quality control whereby bad chips get out sporadically and are not limited to a particular batch. Maybe something in the rest of the phone and not the modem however until Apple takes some of the bad phones and stress tests them to figure a root cause, we may never know and they may not want to publicize it. Ask Apple for a new phone. I responded back to the Apple tech tonight to let him know of my results. They need to end the pain quickly for customers that have spent a small fortune on a new phone.

I have had the problem for a month and went back to my old X. People keep posting to turn off LTE. Disabling functionality is not a solution to the problem and at best is a sort-of work around although it still doesn't eliminate all dropped calls. After Apple loaded some logging profiles and collecting data, what they confirmed is that I dropped many calls, as much as 15 times in a half hour. Hardware tests looked like all worked fine. Dropped calls were particularly bad if I was driving around an it appeared the phone could not make the handoff to the new tower. Apple agreed to replace the phone last night, on them, and not using my Apple Care. I drove around tonight and made a call from my new phone Xs to an old 6S Plus. Went all over the city with the phones connected for more than 2 hours without dropping a call. It appears the phone swap resolved the dropped call issue. I saw someone else say they swapped the phone and walked out of Apple and had the new phone drop calls. I suspect either a bad batch of the new Intel cellular modems or maybe just poor quality control whereby bad chips get out sporadically and are not limited to a particular batch. Maybe something in the rest of the phone and not the modem however until Apple takes some of the bad phones and stress tests them to figure a root cause, we may never know and they may not want to publicize it. Ask Apple for a new phone. I responded back to the Apple tech tonight to let him know of my results. They need to end the pain quickly for customers that have spent a small fortune on a new phone.

It is not the carrier. It is definitely the iPhone. I have a android Pixel XL (personal phone) setting directly beside my XS max (work phone) at all times and never drop/miss calls with the android.

This has been going on since November for me and I make and receive over 100 phone calls a day. The only permanent fix is to turn off LTE calling in cellular settings. Resetting network settings or rebooting works temporarily. I have raise to wake off and that doesn’t help.

I hope it is a software issue but I have been waiting for a fix for 4 months and 2-3 updates and the issue still persists. Either apple doesn’t care or isn’t aware of the issue.

It seems to happen to me after going to an area with little to no LTE signal. It is like the LTE calling never hooks back up fully even though I have full LTE signal. Data is unaffected.

Settings >general>reset> reset network settings.

it will just ask you to sign into the wifi again - make sure that wifi assist is turned off.

go to

Settings> wifi> turn off wifi assist.

No, update will not help if it is hardware. I have also tried 12.1 since I had developer Beta for the last few weeks, now on 12.1.1. I think you are going to struggle until you get the phone replaced. I found an article today that didn't look too good for the Intel cellular modem. The article is 4 months old but it sheds some light on the Intel modem and failure rate in production early on. My phone apparently passed all hardware diagnostics but the article makes me wonder about the reliability of the chips, especially early production where almost have of them would not passed quality checks on the production line. I got my first Xs on the first Friday that the phones were being delivered to customers.

"In late April Patently Apple posted a report titled "Intel may be able to grab the Lion's Share of Apple's iPhone modem Business in 2018 if Chip Yields can improve." The report noted that the modem-chip yield rates weren't what Intel expected. Just a little more than half of the chips being produced were actually keepers. Yet Intel engineers were confident they could work the bugs out and push up the yield rates before production ramps into high gear in June and July. "

https://www.patentlyapple.com/patently-apple/2018/06/intel-ramping-up-production -of-their-xmm-7560-lte-advanced-pro-modem-for-iphones-that-could-deliver-up-to-1 -gbps-speeds.html

I have run around with Apple and Verizon about this issue for some time. Let me list the problems I'm having, all related to VoLTE and the XS Max.

1. Calls drop after 2 seconds into phone call, with repeated phone calls all dropping with phone alerting "Call Failed"
2. Dialing a number and hearing a recording from Verizon saying "Welcome to Verizon Wireless, the called party is not available"
3. Dialing a number and after pressing send seeing a clickable dialogue on the phone saying "Last line no longer available. Do you want to call using your remaining line?"
4. Some inbound calls going strait to voicemail.

Again, all this can be fixed by turning VoLTE off. However this is not a suitable solution as I loose internet connection while on phone calls.

Also note that this is happening to my wife as well and we have both replaced our phones with new ones from Apple. As well as reset our phones and set them up as a new phone. (My personal favorite 5 hours of wasted time solution to every problem from Apple)

I assume we will see a solution to this in a future update with no acknowledgment from Apple, who knows, maybe they will surprise us.

Ive had this problem too. This is the fix. Goto settings, mobile, mobile data options, enable 4g, select data only. Fixed

Ive had this problem too. This is the fix. Goto settings, mobile, mobile data options, enable 4g, select data only. Fixed

Open a case with Apple so they have visibility to the amount of phones with issues. I opened a case and they are aware of issues and are collecting data to try to resolve. I have made some observations and am curious if others see the same thing. Calls drop within seconds or several minutes most of the time and it occurs when I am driving/moving with the phone. I see the cell signal change a couple of bars either up or down and then the call drops. It is as if the phone is switching towers and cannot make it. When the call drops, almost without exception, there are 3-4 bars of cell service indicated. I really notice it in the car with carplay because the signal strength is mirrored on the car display in front of me and I catch the movement and blip. When Apple called me at home on another line and I made a call to try to duplicate the issue, the call didn't fail after 20 minutes - I was sitting at home stationary. Today I intentionally made a couple of calls while stationary and good signal and one lasted 1hr39 to a landline and then hung up (did not fail) and another call to an iPhone 6s+ for 41 minutes and it did not fail. Anyone else observer the same thing?

Please try doing what l suggested in my early post regarding the call dropping.

Go into setting then Display and Brightness and turn off the LOCK and UNLOCK which l have done on my iPhone XS MAX and the call dropping has STOPPED.

let me know how you get on

As l mentioned in a earlier post I was having the very same issue with my brand new iPhone XS Max with the calls cutting off at he beginning of a call and sometimes during the call also.

so l began a number of trials and errors with the software on the iPhone going through them one by one.

I found by by turning off the auto lock/unlock in the brightness and display setting l found that my iPhone no longer has the problem and as updates are released from Apple l turn this setting by on to see if the issue has been resolved unfortunately it hasn’t been as yet...

it worked for me it may work for you..

Start with the basic steps: Restart your iPhone, iPad, or iPod touch
For you Wi-Fi issues, use these steps to troubleshoot this: If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
Thank you for using Apple Support Communities.
Have a great day!

What a pest for you. Have you noticed the new antenna's on the outside corners of the phone. I watched a youtube video regarding people losing signal when making calls because those new antennas were covered over. I am wondering now, if they are going to do a recall. The issue is now being called Antenna Gate.

Follow up..... I got an updated SIM card from Verizon 2 days ago (the old one was recieved with my iPhone 6 several yeas ago). Then I went to apple and they ran a diagnostic that confirmed all the dropped calls ( I never knew the phone kept track of dropped calls!). Since the new sim I tested it out quite a bit and have had no issues, but it has only been two days.

I popped into the Apple store yesterday. I was attended to at the Genius Bar re: problem of missed calls. I asked the Genius technician if he had come across this problem before? He looked me squarely in the eye and said that I was the first one. Meanwhile the Lady beside me I had just met in an Apple class in the store- was sitting beside me speaking to a Genius technician with exactly same issue- dropped calls.

Bizarre?!

He ran a diagnostic, and it turned out my 12 day old IPhone X’s Max had 11 dropped calls. I swear that it seems More than 11 calls. The technician said to me that he didn’t think that that was that many?!?!?!?!?!

He reset the factory settings. That was about it. More like- suck it and see.

He also told me I had 14 days since purchase to return then buy a new one- which would take me to next Monday....so what happens on Tuesday?- Day 15?! The calls continue to drop and Apple won’t swap my phone?