iOS 13.6.1 Wi-Fi network issues

Reset Network Settings: Only network settings are removed.

• When you reset network settings, previously used networks and VPN settings that weren’t installed by a configuration profile or mobile device management (MDM) are removed. Wi-Fi is turned off and then back on, disconnecting you from any network you’re on. The Wi-Fi and Ask to Join Networks settings remain turned on.
• To remove VPN settings installed by a configuration profile, go to Settings > General > Profiles & Device Management, select the configuration profile, then tap Remove Profile. This also removes other settings and accounts provided by the profile. See Install or remove configuration profiles on iPhone in this guide.
• To remove network settings installed by MDM, go to Settings > General > Profiles & Device Management, select the management, then tap Remove Management. This also removes other settings and certificates provided by MDM. See “Mobile device management (MDM)” in the iOS Deployment Reference.
• Reset your Network Settings. Tap Settings > General > Reset > Reset Network Settings. This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before.

After trying everything under the sun, the one thing that finally worked for me was doing a hard reset, found on this page

http://www.iphonehacks.com/2019/09/fix-ios-13-wifi-not-working-slow-dropping-out-issues.html:

• On an iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone XS, iPhone XS Max, iPhone XR, iPhone X, iPhone 8, and iPhone 8 Plus, press and quickly release the Volume Upbutton. Press and quickly release the Volume Down button. Then press and hold the Side button until you see the Apple logo.
• On an iPhone 7 or iPhone 7 Plus, press and hold both the Side and Volume Downbuttons for at least 10 seconds, until you see the Apple logo.
• On an iPhone 6s and earlier, iPad, or iPod touch; press and hold both the Home and the Top (or Side) buttons for at least 10 seconds, until you see the Apple logo.
• On an iPad Pro 11-inch or iPad Pro 12.9-inch, press and quickly release the Volume Upbutton. Press and quickly release the Volume Down button. Then press and hold the Power button until the device restarts.

Reset All Settings: All settings—including network settings, the keyboard dictionary, the Home screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.

1. Reset All Settings: Return iPhone settings to their defaults - Apple Support:- Return iPhone settings to their defaults
2. You can return settings to their defaults without erasing your content.
3. If you want to save your settings, back up iPhone before returning them to their defaults. For example, if you’re trying to solve a problem but returning settings to their defaults doesn’t help, you might want to restore your previous settings from a backup.

After debugging with the support of our carrier we found out that the now failing SIM is very old (over 6 years). Theory is it is no longer supported 🤷🏻‍♂️.

Getting a new one tomorrow and will post here when I know more.

I had the same problems after 13.6.1 update after not having any issues with my phone for several years. I too spent hours on a chat with the Apple support staff who were actually really great, but we couldn't fix the issue as it also gave a failed circuit board error message when running diagnostics on it! So, they have me setup for mail-in to Apple store since I’m out in the country and can’t make it to a store over an hour away.

but last night I allowed the 13.7 update to run and it looks like the cellular data is working ok again! Funny how Apple came out with the 13.7 update so quick after the failed 13.6.1 update! I’m hoping this was the fix I needed. The battery did take a hit after the 13.6.1 update, but I can always get that replaced later. They said the battery wasn’t covered for this repair anyway even though I never had a battery error prior to the 13.6.1 update.

anyone else experience installing 13.7 update that fixed the 13.6.1 issues??

I was also very apprehensive to do so, but since I could no longer send or receive calls, it was either try the update, or try more drastic measures!

The 13.7 update fixed the WiFi and “No Service” errors and works fine now.

Resetting network settings didn't work for me.

I also tried switching sims with a phone that was not upgraded to 13.6.1 yet (both sims same carrier). Interestingly the SIM seems to be the issue now (Other sim worked on the 13.6.1 phone. "Poisoned" SIM does not work on the 13.6.0 phone)

Replacing the SIM "fixed" the issue for us.

Of course I don't know if this is the same issue as for other people. For us the old SIM did stop working right after the software upgrade and nothing else unusual happened around that time. But that could just be coincidence.

How many of us are in UK ? Cos I contacted Apple they said I need to bring in for check and repair if required, Contacted my network provider who is Lebara (Vodafone) and they said they are aware of this problem and have many similar complaint and they are working on it they took many details including my location and IMEI.

Kindly contact your service provider and let them know.

Hope this helps to all and things get back to normal soon

I was facing this for 15-20 days, the ultimate solution which worked was replacing the SIM. Perhaps the new new iOS is not able to support the old or caulty chip in the SIM card. After i changed my sim the issue was fixed and the battery life has also improved a lot. So give that a try.

Has anyone tried replacing the SIM card?

This worked for me, it was suggested and provided by my carrier. Installed the new sim, had it activated, back in business. Good Luck!

I honestly don't think Apple really knows what happened to these iphones after the IOS update 13.6.1 as it's only been out about a week. It's a mess. He said the more people that call in and log a support case the more seriously they will take it. He did a diagnostic test on my phone and even remotely took control. No easy fix...have to send phone to Apple for repair. Prior to this I've tried every possible reset option: turning airplane mode on/off, resetting network settings, connecting to computer via itunes, resetting device completely (setting up as a new iphone and removing all apps, etc). My carrier TMobile said they are fielding lots of calls and they believe it's an Apple hardware issue.

Try turning your iPhone all the way off then wait 1 minute to turn it back on.

I had this problem since Saturday afternoon when I updated to 13.6.1 looks there is some problem between service providers and Apple cos my service provider told they are having numerous complaints with Iphone user, My service provider took all my details alongwith Iph model even IMEI number and told Vodafone knows about this and are working on this.

(Same its my business number -UK kitchen - bathroom supplier) but am using my sim on other Iph and its working perfectly fine and have update too on 13.6.1 but my actual iph stopped or can say barred from cellular network, wifi i working fine as of now.

I’m in Australia and have 4 phones 3XRs and 1 7+. Two of the XRs were having call problems immediately after installing the 13.6.1 upgrade, missing most calls or ringing once then dropping out and when trying to make calls not connecting/ringing then timing out, we were also suffering extremely slow mobile wifi speed. I was able to send and receive text messages OK!

so I took both the affected phones into the store to get them checked, the technician plugged one in and did a diagnostic check which returns no faults. He wanted to do a backup and then perform a factory settings restore but as I don’t backup to the cloud was going to do it myself after I’d done the backup and if that didn’t work then advise me to replace the SIM card.

So I never managed to do the backup and restore that night and then the next morning without doing anything all of the problems we were having with both phones were gone and two days later are still working fine!