I have updated the operating system on my iPhone 8 Plus from iOS 14 to iOS 16.7, and now the Wi-Fi and Bluetooth have turned off and cannot be turned back on.

Question

Level 1

4 points

I have updated the operating system on my iPhone 8 Plus from iOS 14 to iOS 16.7, and now the Wi-Fi and Bluetooth have turned off and cannot be turned back on.

The corresponding ‘panic-full-2023-12-27-000522.0002 .ips’ file is as follows:

{"bug_type":"210","timestamp":"2023-12-27 00:05:22.00 +0800","os_version":"iPhone OS 16.7.3 (20H232)","roots_installed":0,"incident_id":"AD2A3444-7E6D-425F-BE31-9634FBF92B05"}

{

"build" : "iPhone OS 16.7.3 (20H232)",

"product" : "iPhone10,2",

"socId" : "8015",

"socRevision" : "11",

"incident" : "AD2A3444-7E6D-425F-BE31-9634FBF92B05",

"crashReporterKey" : "c6a79c2cc65ac88dcd51c10cedaef59e7e6d57e5",

"kernel" : "Darwin Kernel Version 22.6.0: Tue Nov 7 21:41:17 PST 2023; root:xnu-8796.142.1.702.9~1\/RELEASE_ARM64_T8015",

"date" : "2023-12-27 00:05:22.15 +0800",

"panicString" : "panic(cpu 4 caller 0xfffffff0104168b0): \"apcie[3:wlan] failed to train link to desired speed: expected 2 actual 1\" @AppleEmbeddedPCIEPort.cpp:2682\nDebugger message: panic\nMemory ID: 0x6\nOS release type: Not set yet\nOS version: Not set yet\nKernel version: Darwin Kernel Version 22.6.0: Tue Nov 7 21:41:17 PST 2023; root:xnu-8796.142.1.702.9~1\/RELEASE_ARM64_T8015\nKernelCache UUID: 842B8ADFCF50B272E7CC570C92D2606B\nKernel UUID: C5429369-571A-3EAE-9CFB-8985A9637045\nBoot session UUID: AD2A3444-7E6D-425F-BE31-9634FBF92B05\niBoot version: iBoot-8422.142.2.700.1\nsecure boot?: YES\nroots installed: 0\nPaniclog version: 14\nKernel slide: 0x000000000a14c000\nKernel text base: 0xfffffff011150000\nmach_absolute_time: 0xdfb3f71\nEpoch Time: sec usec\n Boot : 0x658af9a9 0x0006f7d9\n Sleep : 0x00000000 0x00000000\n Wake : 0x00000000 0x00000000\n Calendar: 0x658af9aa 0x0001aa49\n\nZone info:\n Zone map: 0xffffffdc06c48000 - 0xffffffe206c48000\n . VM : 0xffffffdc06c48000 - 0xffffffdced2ac000\n . RO : 0xffffffdced2ac000 - 0xffffffdd39f78000\n . GEN0 : 0xffffffdd39f78000 - 0xffffffde205dc000\n . GEN1 : 0xffffffde205dc000 - 0xffffffdf06c40000\n . GEN2 : 0xffffffdf06c40000 - 0xffffffdfed2a8000\n . GEN3 : 0xffffffdfed2a8000 - 0xffffffe0d3910000\n . DATA : 0xffffffe0d3910000 - 0xffffffe206c48000\n Metadata: 0xffffffe2e8a44000 - 0xffffffe2ea244000\n Bitmaps : 0xffffffe2ea244000 - 0xffffffe2eaab8000\n Extra : 0 - 0\n\nTPIDRx_ELy = {1: 0xffffffde202fe3b0 0: 0x0000000000000004 0ro: 0x0000000000000000 }\nCORE 0: PC=0xfffffff01137070c, LR=0xfffffff01137070c, FP=0xffffffefa03a7ef0\nCORE 1: PC=0xfffffff01137070c, LR=0xfffffff01137070c, FP=0xffffffefa015bef0\nCORE 2: PC=0xfffffff01137070c, LR=0xfffffff01137070c, FP=0xffffffefa024bef0\nCORE 3: PC=0xfffffff01137070c, LR=0xfffffff01137070c, FP=0xffffffefa038fef0\nCORE 4 is the one that panicked. Check the full backtrace for details.\nCORE 5: PC=0xfffffff0114610c0, LR=0xfffffff011370918, FP=0xffffffefa04ebef0\nCompressor Info: 0% of compressed pages limit (OK) and 0% of segments limit (OK) with 0 swapfiles and OK swap space\nPanicked task 0xffffffde205079f8: 0 pages, 235 threads: pid 0: kernel_task\nPanicked thread: 0xffffffde202fe3b0, backtrace: 0xffffffef9fd536f0, tid: 274\n\t\t lr: 0xfffffff0113445cc fp: 0xffffffef9fd53760\n\t\t lr: 0xfffffff01145f774 fp: 0xffffffef9fd537d0\n\t\t lr: 0xfffffff01145e874 fp: 0xffffffef9fd538b0\n\t\t lr: 0xfffffff0113095fc fp: 0xffffffef9fd538c0\n\t\t lr: 0xfffffff011344014 fp: 0xffffffef9fd53c70\n\t\t lr: 0xfffffff0119714e4 fp: 0xffffffef9fd53c90\n\t\t lr: 0xfffffff0104168b0 fp: 0xffffffef9fd53d20\n\t\t lr: 0xfffffff010416460 fp: 0xffffffef9fd53d80\n\t\t lr: 0xfffffff01040f210 fp: 0xffffffef9fd53e70\n\t\t lr: 0xfffffff0118c5410 fp: 0xffffffef9fd53ec0\n\t\t lr: 0xfffffff0118c3ff8 fp: 0xffffffef9fd53ef0\n\t\t lr: 0xfffffff0118c3940 fp: 0xffffffef9fd53f20\n\t\t lr: 0xfffffff011314780 fp: 0x0000000000000000\n\n",

"panicFlags" : "0x802",

"bug_type" : "210",

"otherString" : "\n** Stackshot Succeeded ** Bytes Traced 21612 (Uncompressed 78272) **\n",

"repairStatus" : "3",

"memoryStatus" : {"compressorSize":0,"compressions":0,"decompressions":0,"busyBufferCount":1,"memoryPressureDetails":{"pagesWanted":0,"pagesReclaimed":0},"pageSize":16384,"memoryPressure":false,"memoryPages":{"active":0,"throttled":0,"fileBacked":44,"wired":11838,"purgeable":2,"inactive":13,"free":168408,"speculative":32}},

iPhone 8 Plus

Posted on Jan 1, 2024 1:42 AM

Reply

Answer 1

Top-ranking reply

SravanKrA

Community+ 2025

Level 10

430,784 points

Jan 1, 2024 1:45 AM in response to hanjie274

This issue is not related to any of the iOS updates. If it were, millions of other iPhones would have been affected as well.

Sometimes, a simple restart can resolve temporary software glitches. Turn off your iPhone, wait for a few seconds, and then turn it back on.

Restart the device. That's it.
Still not solved --> Force restart iPhone - Apple Support

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.

If the above fails...

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.

Reset All Settings: Return iPhone settings to their defaults - Apple Support:- Return iPhone settings to their defaults
You can return settings to their defaults without erasing your content.
If you want to save your settings, back up your 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.

If nothing above works probably it could be your iPhone may have a WiFi radio or antenna problem. In that case, take your device to an Apple Retail Store or Apple Authorized Service Provider, or contact Apple Support and get the hardware tested and if needed repaired/replaced.

Find Locations - Location Selector - Apple

Contact Apple for support and service - Apple Support

Get a Genius Bar Reservation and Apple Support Options - Apple

Contact Genius Bar. Manage Reservations - My Reservations - Apple

Reply

Answer 2

hanjie274 Author

Level 1

4 points

Jan 1, 2024 2:03 AM in response to SravanKrA

My intention was that there might be some issues with my Wi-Fi hardware, but iOS 14 allowed me to use it normally. iOS 16 has stricter validation. I want to try downgrading to iOS 14, but it seems like Apple has disabled the downgrade to iOS 14, which is such a tragic thing.

Reply

Answer 3

hanjie274 Author

Level 1

4 points

Jan 1, 2024 1:59 AM in response to SravanKrA

The error log states: "panic(cpu 4 caller 0xfffffff0104168b0): "apcie[3:wlan] failed to train link to desired speed: expected 2 actual 1," which indicates that the speed is insufficient. Is it possible that iOS 14 supports running Wi-Fi at a lower speed, whereas iOS 16 forces Wi-Fi to not run at all?

I clearly remember that before the upgrade, iOS 14 was working fine, but after the upgrade, it no longer functions properly.

How do I downgrade to iOS 14?

Reply

Answer 4

hanjie274 Author

Level 1

4 points

Jan 1, 2024 1:55 AM in response to SravanKrA

Nothing above works !

How do I downgrade to iOS 14?

Reply

I have updated the operating system on my iPhone 8 Plus from iOS 14 to iOS 16.7, and now the Wi-Fi and Bluetooth have turned off and cannot be turned back on.

Similar questions